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https://github.com/RPCS3/llvm-mirror.git
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8ba538f8a2
These do things like turn a multiply of a pow-2+1 into a shift and and add, which is a common pattern that pops up, and is universally better than expensive madd instructions with a constant. I've added check lines to an existing codegen test since the code being ported is almost identical, however the mul by negative pow2 constant tests don't generate the same code because we're missing some generic G_MUL combines still. Differential Revision: https://reviews.llvm.org/D91125
703 lines
14 KiB
LLVM
703 lines
14 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=aarch64-eabi | FileCheck %s
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; RUN: llc < %s -mtriple=aarch64-eabi -global-isel -global-isel-abort=1 | FileCheck %s --check-prefix=GISEL
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; Convert mul x, pow2 to shift.
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; Convert mul x, pow2 +/- 1 to shift + add/sub.
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; Convert mul x, (pow2 + 1) * pow2 to shift + add + shift.
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; Lowering other positive constants are not supported yet.
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define i32 @test2(i32 %x) {
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; CHECK-LABEL: test2:
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; CHECK: // %bb.0:
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; CHECK-NEXT: lsl w0, w0, #1
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test2:
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; GISEL: // %bb.0:
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; GISEL-NEXT: lsl w0, w0, #1
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; GISEL-NEXT: ret
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%mul = shl nsw i32 %x, 1
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ret i32 %mul
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}
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define i32 @test3(i32 %x) {
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; CHECK-LABEL: test3:
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; CHECK: // %bb.0:
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; CHECK-NEXT: add w0, w0, w0, lsl #1
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test3:
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; GISEL: // %bb.0:
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; GISEL-NEXT: add w0, w0, w0, lsl #1
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; GISEL-NEXT: ret
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%mul = mul nsw i32 %x, 3
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ret i32 %mul
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}
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define i32 @test4(i32 %x) {
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; CHECK-LABEL: test4:
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; CHECK: // %bb.0:
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; CHECK-NEXT: lsl w0, w0, #2
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test4:
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; GISEL: // %bb.0:
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; GISEL-NEXT: lsl w0, w0, #2
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; GISEL-NEXT: ret
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%mul = shl nsw i32 %x, 2
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ret i32 %mul
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}
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define i32 @test5(i32 %x) {
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; CHECK-LABEL: test5:
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; CHECK: // %bb.0:
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; CHECK-NEXT: add w0, w0, w0, lsl #2
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test5:
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; GISEL: // %bb.0:
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; GISEL-NEXT: add w0, w0, w0, lsl #2
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; GISEL-NEXT: ret
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%mul = mul nsw i32 %x, 5
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ret i32 %mul
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}
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define i32 @test6_32b(i32 %x) {
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; CHECK-LABEL: test6_32b:
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; CHECK: // %bb.0:
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; CHECK-NEXT: add w8, w0, w0, lsl #1
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; CHECK-NEXT: lsl w0, w8, #1
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test6_32b:
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; GISEL: // %bb.0:
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; GISEL-NEXT: add w8, w0, w0, lsl #1
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; GISEL-NEXT: lsl w0, w8, #1
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; GISEL-NEXT: ret
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%mul = mul nsw i32 %x, 6
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ret i32 %mul
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}
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define i64 @test6_64b(i64 %x) {
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; CHECK-LABEL: test6_64b:
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; CHECK: // %bb.0:
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; CHECK-NEXT: add x8, x0, x0, lsl #1
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; CHECK-NEXT: lsl x0, x8, #1
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test6_64b:
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; GISEL: // %bb.0:
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; GISEL-NEXT: add x8, x0, x0, lsl #1
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; GISEL-NEXT: lsl x0, x8, #1
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; GISEL-NEXT: ret
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%mul = mul nsw i64 %x, 6
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ret i64 %mul
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}
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; mul that appears together with add, sub, s(z)ext is not supported to be
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; converted to the combination of lsl, add/sub yet.
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define i64 @test6_umull(i32 %x) {
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; CHECK-LABEL: test6_umull:
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; CHECK: // %bb.0:
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; CHECK-NEXT: mov w8, #6
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; CHECK-NEXT: umull x0, w0, w8
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test6_umull:
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; GISEL: // %bb.0:
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; GISEL-NEXT: mov w8, #6
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; GISEL-NEXT: umull x0, w0, w8
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; GISEL-NEXT: ret
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%ext = zext i32 %x to i64
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%mul = mul nsw i64 %ext, 6
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ret i64 %mul
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}
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define i64 @test6_smull(i32 %x) {
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; CHECK-LABEL: test6_smull:
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; CHECK: // %bb.0:
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; CHECK-NEXT: mov w8, #6
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; CHECK-NEXT: smull x0, w0, w8
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test6_smull:
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; GISEL: // %bb.0:
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; GISEL-NEXT: mov w8, #6
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; GISEL-NEXT: smull x0, w0, w8
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; GISEL-NEXT: ret
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%ext = sext i32 %x to i64
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%mul = mul nsw i64 %ext, 6
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ret i64 %mul
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}
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define i32 @test6_madd(i32 %x, i32 %y) {
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; CHECK-LABEL: test6_madd:
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; CHECK: // %bb.0:
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; CHECK-NEXT: mov w8, #6
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; CHECK-NEXT: madd w0, w0, w8, w1
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test6_madd:
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; GISEL: // %bb.0:
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; GISEL-NEXT: mov w8, #6
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; GISEL-NEXT: madd w0, w0, w8, w1
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; GISEL-NEXT: ret
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%mul = mul nsw i32 %x, 6
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%add = add i32 %mul, %y
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ret i32 %add
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}
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define i32 @test6_msub(i32 %x, i32 %y) {
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; CHECK-LABEL: test6_msub:
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; CHECK: // %bb.0:
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; CHECK-NEXT: mov w8, #6
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; CHECK-NEXT: msub w0, w0, w8, w1
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test6_msub:
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; GISEL: // %bb.0:
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; GISEL-NEXT: mov w8, #6
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; GISEL-NEXT: msub w0, w0, w8, w1
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; GISEL-NEXT: ret
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%mul = mul nsw i32 %x, 6
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%sub = sub i32 %y, %mul
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ret i32 %sub
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}
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define i64 @test6_umaddl(i32 %x, i64 %y) {
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; CHECK-LABEL: test6_umaddl:
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; CHECK: // %bb.0:
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; CHECK-NEXT: mov w8, #6
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; CHECK-NEXT: umaddl x0, w0, w8, x1
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test6_umaddl:
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; GISEL: // %bb.0:
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; GISEL-NEXT: mov w8, #6
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; GISEL-NEXT: umaddl x0, w0, w8, x1
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; GISEL-NEXT: ret
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%ext = zext i32 %x to i64
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%mul = mul nsw i64 %ext, 6
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%add = add i64 %mul, %y
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ret i64 %add
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}
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define i64 @test6_smaddl(i32 %x, i64 %y) {
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; CHECK-LABEL: test6_smaddl:
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; CHECK: // %bb.0:
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; CHECK-NEXT: mov w8, #6
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; CHECK-NEXT: smaddl x0, w0, w8, x1
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test6_smaddl:
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; GISEL: // %bb.0:
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; GISEL-NEXT: mov w8, #6
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; GISEL-NEXT: smaddl x0, w0, w8, x1
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; GISEL-NEXT: ret
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%ext = sext i32 %x to i64
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%mul = mul nsw i64 %ext, 6
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%add = add i64 %mul, %y
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ret i64 %add
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}
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define i64 @test6_umsubl(i32 %x, i64 %y) {
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; CHECK-LABEL: test6_umsubl:
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; CHECK: // %bb.0:
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; CHECK-NEXT: mov w8, #6
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; CHECK-NEXT: umsubl x0, w0, w8, x1
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test6_umsubl:
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; GISEL: // %bb.0:
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; GISEL-NEXT: mov w8, #6
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; GISEL-NEXT: umsubl x0, w0, w8, x1
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; GISEL-NEXT: ret
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%ext = zext i32 %x to i64
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%mul = mul nsw i64 %ext, 6
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%sub = sub i64 %y, %mul
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ret i64 %sub
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}
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define i64 @test6_smsubl(i32 %x, i64 %y) {
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; CHECK-LABEL: test6_smsubl:
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; CHECK: // %bb.0:
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; CHECK-NEXT: mov w8, #6
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; CHECK-NEXT: smsubl x0, w0, w8, x1
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test6_smsubl:
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; GISEL: // %bb.0:
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; GISEL-NEXT: mov w8, #6
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; GISEL-NEXT: smsubl x0, w0, w8, x1
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; GISEL-NEXT: ret
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%ext = sext i32 %x to i64
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%mul = mul nsw i64 %ext, 6
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%sub = sub i64 %y, %mul
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ret i64 %sub
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}
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define i64 @test6_umnegl(i32 %x) {
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; CHECK-LABEL: test6_umnegl:
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; CHECK: // %bb.0:
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; CHECK-NEXT: mov w8, #6
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; CHECK-NEXT: umnegl x0, w0, w8
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test6_umnegl:
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; GISEL: // %bb.0:
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; GISEL-NEXT: mov w8, #6
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; GISEL-NEXT: umnegl x0, w0, w8
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; GISEL-NEXT: ret
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%ext = zext i32 %x to i64
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%mul = mul nsw i64 %ext, 6
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%sub = sub i64 0, %mul
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ret i64 %sub
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}
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define i64 @test6_smnegl(i32 %x) {
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; CHECK-LABEL: test6_smnegl:
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; CHECK: // %bb.0:
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; CHECK-NEXT: mov w8, #6
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; CHECK-NEXT: smnegl x0, w0, w8
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test6_smnegl:
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; GISEL: // %bb.0:
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; GISEL-NEXT: mov w8, #6
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; GISEL-NEXT: smnegl x0, w0, w8
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; GISEL-NEXT: ret
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%ext = sext i32 %x to i64
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%mul = mul nsw i64 %ext, 6
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%sub = sub i64 0, %mul
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ret i64 %sub
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}
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define i32 @test7(i32 %x) {
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; CHECK-LABEL: test7:
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; CHECK: // %bb.0:
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; CHECK-NEXT: lsl w8, w0, #3
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; CHECK-NEXT: sub w0, w8, w0
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test7:
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; GISEL: // %bb.0:
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; GISEL-NEXT: lsl w8, w0, #3
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; GISEL-NEXT: sub w0, w8, w0
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; GISEL-NEXT: ret
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%mul = mul nsw i32 %x, 7
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ret i32 %mul
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}
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define i32 @test8(i32 %x) {
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; CHECK-LABEL: test8:
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; CHECK: // %bb.0:
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; CHECK-NEXT: lsl w0, w0, #3
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test8:
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; GISEL: // %bb.0:
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; GISEL-NEXT: lsl w0, w0, #3
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; GISEL-NEXT: ret
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%mul = shl nsw i32 %x, 3
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ret i32 %mul
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}
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define i32 @test9(i32 %x) {
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; CHECK-LABEL: test9:
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; CHECK: // %bb.0:
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; CHECK-NEXT: add w0, w0, w0, lsl #3
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test9:
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; GISEL: // %bb.0:
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; GISEL-NEXT: add w0, w0, w0, lsl #3
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; GISEL-NEXT: ret
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%mul = mul nsw i32 %x, 9
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ret i32 %mul
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}
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define i32 @test10(i32 %x) {
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; CHECK-LABEL: test10:
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; CHECK: // %bb.0:
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; CHECK-NEXT: add w8, w0, w0, lsl #2
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; CHECK-NEXT: lsl w0, w8, #1
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test10:
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; GISEL: // %bb.0:
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; GISEL-NEXT: add w8, w0, w0, lsl #2
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; GISEL-NEXT: lsl w0, w8, #1
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; GISEL-NEXT: ret
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%mul = mul nsw i32 %x, 10
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ret i32 %mul
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}
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define i32 @test11(i32 %x) {
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; CHECK-LABEL: test11:
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; CHECK: // %bb.0:
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; CHECK-NEXT: mov w8, #11
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; CHECK-NEXT: mul w0, w0, w8
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test11:
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; GISEL: // %bb.0:
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; GISEL-NEXT: mov w8, #11
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; GISEL-NEXT: mul w0, w0, w8
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; GISEL-NEXT: ret
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%mul = mul nsw i32 %x, 11
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ret i32 %mul
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}
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define i32 @test12(i32 %x) {
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; CHECK-LABEL: test12:
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; CHECK: // %bb.0:
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; CHECK-NEXT: add w8, w0, w0, lsl #1
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; CHECK-NEXT: lsl w0, w8, #2
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test12:
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; GISEL: // %bb.0:
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; GISEL-NEXT: add w8, w0, w0, lsl #1
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; GISEL-NEXT: lsl w0, w8, #2
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; GISEL-NEXT: ret
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%mul = mul nsw i32 %x, 12
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ret i32 %mul
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}
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define i32 @test13(i32 %x) {
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; CHECK-LABEL: test13:
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; CHECK: // %bb.0:
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; CHECK-NEXT: mov w8, #13
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; CHECK-NEXT: mul w0, w0, w8
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test13:
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; GISEL: // %bb.0:
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; GISEL-NEXT: mov w8, #13
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; GISEL-NEXT: mul w0, w0, w8
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; GISEL-NEXT: ret
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%mul = mul nsw i32 %x, 13
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ret i32 %mul
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}
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define i32 @test14(i32 %x) {
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; CHECK-LABEL: test14:
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; CHECK: // %bb.0:
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; CHECK-NEXT: mov w8, #14
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; CHECK-NEXT: mul w0, w0, w8
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test14:
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; GISEL: // %bb.0:
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; GISEL-NEXT: mov w8, #14
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; GISEL-NEXT: mul w0, w0, w8
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; GISEL-NEXT: ret
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%mul = mul nsw i32 %x, 14
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ret i32 %mul
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}
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define i32 @test15(i32 %x) {
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; CHECK-LABEL: test15:
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; CHECK: // %bb.0:
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; CHECK-NEXT: lsl w8, w0, #4
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; CHECK-NEXT: sub w0, w8, w0
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test15:
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; GISEL: // %bb.0:
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; GISEL-NEXT: lsl w8, w0, #4
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; GISEL-NEXT: sub w0, w8, w0
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; GISEL-NEXT: ret
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%mul = mul nsw i32 %x, 15
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ret i32 %mul
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}
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define i32 @test16(i32 %x) {
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; CHECK-LABEL: test16:
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; CHECK: // %bb.0:
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; CHECK-NEXT: lsl w0, w0, #4
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: test16:
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; GISEL: // %bb.0:
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; GISEL-NEXT: lsl w0, w0, #4
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; GISEL-NEXT: ret
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%mul = mul nsw i32 %x, 16
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ret i32 %mul
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}
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; Convert mul x, -pow2 to shift.
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; Convert mul x, -(pow2 +/- 1) to shift + add/sub.
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; Lowering other negative constants are not supported yet.
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define i32 @ntest2(i32 %x) {
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; CHECK-LABEL: ntest2:
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; CHECK: // %bb.0:
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; CHECK-NEXT: neg w0, w0, lsl #1
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; CHECK-NEXT: ret
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;
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; GISEL-LABEL: ntest2:
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; GISEL: // %bb.0:
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; GISEL-NEXT: mov w8, #-2
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; GISEL-NEXT: mul w0, w0, w8
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; GISEL-NEXT: ret
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|
|
%mul = mul nsw i32 %x, -2
|
|
ret i32 %mul
|
|
}
|
|
|
|
define i32 @ntest3(i32 %x) {
|
|
; CHECK-LABEL: ntest3:
|
|
; CHECK: // %bb.0:
|
|
; CHECK-NEXT: sub w0, w0, w0, lsl #2
|
|
; CHECK-NEXT: ret
|
|
;
|
|
; GISEL-LABEL: ntest3:
|
|
; GISEL: // %bb.0:
|
|
; GISEL-NEXT: sub w0, w0, w0, lsl #2
|
|
; GISEL-NEXT: ret
|
|
|
|
%mul = mul nsw i32 %x, -3
|
|
ret i32 %mul
|
|
}
|
|
|
|
define i32 @ntest4(i32 %x) {
|
|
; CHECK-LABEL: ntest4:
|
|
; CHECK: // %bb.0:
|
|
; CHECK-NEXT: neg w0, w0, lsl #2
|
|
; CHECK-NEXT: ret
|
|
;
|
|
; GISEL-LABEL: ntest4:
|
|
; GISEL: // %bb.0:
|
|
; GISEL-NEXT: mov w8, #-4
|
|
; GISEL-NEXT: mul w0, w0, w8
|
|
; GISEL-NEXT: ret
|
|
|
|
%mul = mul nsw i32 %x, -4
|
|
ret i32 %mul
|
|
}
|
|
|
|
define i32 @ntest5(i32 %x) {
|
|
; CHECK-LABEL: ntest5:
|
|
; CHECK: // %bb.0:
|
|
; CHECK-NEXT: add w8, w0, w0, lsl #2
|
|
; CHECK-NEXT: neg w0, w8
|
|
; CHECK-NEXT: ret
|
|
;
|
|
; GISEL-LABEL: ntest5:
|
|
; GISEL: // %bb.0:
|
|
; GISEL-NEXT: add w8, w0, w0, lsl #2
|
|
; GISEL-NEXT: neg w0, w8
|
|
; GISEL-NEXT: ret
|
|
%mul = mul nsw i32 %x, -5
|
|
ret i32 %mul
|
|
}
|
|
|
|
define i32 @ntest6(i32 %x) {
|
|
; CHECK-LABEL: ntest6:
|
|
; CHECK: // %bb.0:
|
|
; CHECK-NEXT: mov w8, #-6
|
|
; CHECK-NEXT: mul w0, w0, w8
|
|
; CHECK-NEXT: ret
|
|
;
|
|
; GISEL-LABEL: ntest6:
|
|
; GISEL: // %bb.0:
|
|
; GISEL-NEXT: mov w8, #-6
|
|
; GISEL-NEXT: mul w0, w0, w8
|
|
; GISEL-NEXT: ret
|
|
|
|
%mul = mul nsw i32 %x, -6
|
|
ret i32 %mul
|
|
}
|
|
|
|
define i32 @ntest7(i32 %x) {
|
|
; CHECK-LABEL: ntest7:
|
|
; CHECK: // %bb.0:
|
|
; CHECK-NEXT: sub w0, w0, w0, lsl #3
|
|
; CHECK-NEXT: ret
|
|
;
|
|
; GISEL-LABEL: ntest7:
|
|
; GISEL: // %bb.0:
|
|
; GISEL-NEXT: sub w0, w0, w0, lsl #3
|
|
; GISEL-NEXT: ret
|
|
|
|
%mul = mul nsw i32 %x, -7
|
|
ret i32 %mul
|
|
}
|
|
|
|
define i32 @ntest8(i32 %x) {
|
|
; CHECK-LABEL: ntest8:
|
|
; CHECK: // %bb.0:
|
|
; CHECK-NEXT: neg w0, w0, lsl #3
|
|
; CHECK-NEXT: ret
|
|
;
|
|
; GISEL-LABEL: ntest8:
|
|
; GISEL: // %bb.0:
|
|
; GISEL-NEXT: mov w8, #-8
|
|
; GISEL-NEXT: mul w0, w0, w8
|
|
; GISEL-NEXT: ret
|
|
|
|
%mul = mul nsw i32 %x, -8
|
|
ret i32 %mul
|
|
}
|
|
|
|
define i32 @ntest9(i32 %x) {
|
|
; CHECK-LABEL: ntest9:
|
|
; CHECK: // %bb.0:
|
|
; CHECK-NEXT: add w8, w0, w0, lsl #3
|
|
; CHECK-NEXT: neg w0, w8
|
|
; CHECK-NEXT: ret
|
|
;
|
|
; GISEL-LABEL: ntest9:
|
|
; GISEL: // %bb.0:
|
|
; GISEL-NEXT: add w8, w0, w0, lsl #3
|
|
; GISEL-NEXT: neg w0, w8
|
|
; GISEL-NEXT: ret
|
|
|
|
%mul = mul nsw i32 %x, -9
|
|
ret i32 %mul
|
|
}
|
|
|
|
define i32 @ntest10(i32 %x) {
|
|
; CHECK-LABEL: ntest10:
|
|
; CHECK: // %bb.0:
|
|
; CHECK-NEXT: mov w8, #-10
|
|
; CHECK-NEXT: mul w0, w0, w8
|
|
; CHECK-NEXT: ret
|
|
;
|
|
; GISEL-LABEL: ntest10:
|
|
; GISEL: // %bb.0:
|
|
; GISEL-NEXT: mov w8, #-10
|
|
; GISEL-NEXT: mul w0, w0, w8
|
|
; GISEL-NEXT: ret
|
|
|
|
%mul = mul nsw i32 %x, -10
|
|
ret i32 %mul
|
|
}
|
|
|
|
define i32 @ntest11(i32 %x) {
|
|
; CHECK-LABEL: ntest11:
|
|
; CHECK: // %bb.0:
|
|
; CHECK-NEXT: mov w8, #-11
|
|
; CHECK-NEXT: mul w0, w0, w8
|
|
; CHECK-NEXT: ret
|
|
;
|
|
; GISEL-LABEL: ntest11:
|
|
; GISEL: // %bb.0:
|
|
; GISEL-NEXT: mov w8, #-11
|
|
; GISEL-NEXT: mul w0, w0, w8
|
|
; GISEL-NEXT: ret
|
|
|
|
%mul = mul nsw i32 %x, -11
|
|
ret i32 %mul
|
|
}
|
|
|
|
define i32 @ntest12(i32 %x) {
|
|
; CHECK-LABEL: ntest12:
|
|
; CHECK: // %bb.0:
|
|
; CHECK-NEXT: mov w8, #-12
|
|
; CHECK-NEXT: mul w0, w0, w8
|
|
; CHECK-NEXT: ret
|
|
;
|
|
; GISEL-LABEL: ntest12:
|
|
; GISEL: // %bb.0:
|
|
; GISEL-NEXT: mov w8, #-12
|
|
; GISEL-NEXT: mul w0, w0, w8
|
|
; GISEL-NEXT: ret
|
|
|
|
%mul = mul nsw i32 %x, -12
|
|
ret i32 %mul
|
|
}
|
|
|
|
define i32 @ntest13(i32 %x) {
|
|
; CHECK-LABEL: ntest13:
|
|
; CHECK: // %bb.0:
|
|
; CHECK-NEXT: mov w8, #-13
|
|
; CHECK-NEXT: mul w0, w0, w8
|
|
; CHECK-NEXT: ret
|
|
;
|
|
; GISEL-LABEL: ntest13:
|
|
; GISEL: // %bb.0:
|
|
; GISEL-NEXT: mov w8, #-13
|
|
; GISEL-NEXT: mul w0, w0, w8
|
|
; GISEL-NEXT: ret
|
|
%mul = mul nsw i32 %x, -13
|
|
ret i32 %mul
|
|
}
|
|
|
|
define i32 @ntest14(i32 %x) {
|
|
; CHECK-LABEL: ntest14:
|
|
; CHECK: // %bb.0:
|
|
; CHECK-NEXT: mov w8, #-14
|
|
; CHECK-NEXT: mul w0, w0, w8
|
|
; CHECK-NEXT: ret
|
|
;
|
|
; GISEL-LABEL: ntest14:
|
|
; GISEL: // %bb.0:
|
|
; GISEL-NEXT: mov w8, #-14
|
|
; GISEL-NEXT: mul w0, w0, w8
|
|
; GISEL-NEXT: ret
|
|
|
|
%mul = mul nsw i32 %x, -14
|
|
ret i32 %mul
|
|
}
|
|
|
|
define i32 @ntest15(i32 %x) {
|
|
; CHECK-LABEL: ntest15:
|
|
; CHECK: // %bb.0:
|
|
; CHECK-NEXT: sub w0, w0, w0, lsl #4
|
|
; CHECK-NEXT: ret
|
|
;
|
|
; GISEL-LABEL: ntest15:
|
|
; GISEL: // %bb.0:
|
|
; GISEL-NEXT: sub w0, w0, w0, lsl #4
|
|
; GISEL-NEXT: ret
|
|
|
|
%mul = mul nsw i32 %x, -15
|
|
ret i32 %mul
|
|
}
|
|
|
|
define i32 @ntest16(i32 %x) {
|
|
; CHECK-LABEL: ntest16:
|
|
; CHECK: // %bb.0:
|
|
; CHECK-NEXT: neg w0, w0, lsl #4
|
|
; CHECK-NEXT: ret
|
|
;
|
|
; GISEL-LABEL: ntest16:
|
|
; GISEL: // %bb.0:
|
|
; GISEL-NEXT: mov w8, #-16
|
|
; GISEL-NEXT: mul w0, w0, w8
|
|
; GISEL-NEXT: ret
|
|
|
|
%mul = mul nsw i32 %x, -16
|
|
ret i32 %mul
|
|
}
|