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910badf6bd
This is extremely specific, but saves three instructions when it's legal. I don't think the code can be usefully generalized. Differential Revision: https://reviews.llvm.org/D65351 llvm-svn: 367492
209 lines
4.6 KiB
LLVM
209 lines
4.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=thumbv6-eabi %s -o - | FileCheck %s
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define void @test1(i32 %x, void ()* %f) {
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; CHECK-LABEL: test1:
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; CHECK: @ %bb.0: @ %entry
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; CHECK-NEXT: .save {r7, lr}
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; CHECK-NEXT: push {r7, lr}
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; CHECK-NEXT: lsls r0, r0, #2
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; CHECK-NEXT: cmp r0, #68
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; CHECK-NEXT: beq .LBB0_2
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; CHECK-NEXT: @ %bb.1: @ %if.then
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; CHECK-NEXT: blx r1
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; CHECK-NEXT: .LBB0_2: @ %if.end
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; CHECK-NEXT: pop {r7, pc}
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entry:
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%a = and i32 %x, 1073741823
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%cmp = icmp eq i32 %a, 17
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br i1 %cmp, label %if.end, label %if.then
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if.then:
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tail call void %f()
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br label %if.end
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if.end:
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ret void
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}
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define void @test2(i32 %x, void ()* %f) {
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; CHECK-LABEL: test2:
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; CHECK: @ %bb.0: @ %entry
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; CHECK-NEXT: .save {r7, lr}
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; CHECK-NEXT: push {r7, lr}
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; CHECK-NEXT: lsls r0, r0, #8
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; CHECK-NEXT: bhi .LBB1_2
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; CHECK-NEXT: @ %bb.1: @ %if.then
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; CHECK-NEXT: blx r1
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; CHECK-NEXT: .LBB1_2: @ %if.end
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; CHECK-NEXT: pop {r7, pc}
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entry:
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%a = shl i32 %x, 7
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%cmp = icmp ugt i32 %a, 2147483648
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br i1 %cmp, label %if.end, label %if.then
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if.then:
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tail call void %f()
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br label %if.end
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if.end:
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ret void
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}
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define void @test3(i32 %x, void ()* %f) {
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; CHECK-LABEL: test3:
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; CHECK: @ %bb.0: @ %entry
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; CHECK-NEXT: .save {r7, lr}
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; CHECK-NEXT: push {r7, lr}
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; CHECK-NEXT: lsls r0, r0, #3
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; CHECK-NEXT: bhi .LBB2_2
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; CHECK-NEXT: @ %bb.1: @ %if.then
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; CHECK-NEXT: blx r1
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; CHECK-NEXT: .LBB2_2: @ %if.end
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; CHECK-NEXT: pop {r7, pc}
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entry:
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%a = and i32 %x, 1073741823
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%cmp = icmp ugt i32 %a, 536870912
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br i1 %cmp, label %if.end, label %if.then
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if.then:
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tail call void %f()
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br label %if.end
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if.end:
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ret void
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}
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define void @test4(i32 %x, void ()* %f) {
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; CHECK-LABEL: test4:
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; CHECK: @ %bb.0: @ %entry
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; CHECK-NEXT: .save {r7, lr}
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; CHECK-NEXT: push {r7, lr}
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; CHECK-NEXT: uxtb r0, r0
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; CHECK-NEXT: cmp r0, #17
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; CHECK-NEXT: beq .LBB3_2
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; CHECK-NEXT: @ %bb.1: @ %if.then
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; CHECK-NEXT: blx r1
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; CHECK-NEXT: .LBB3_2: @ %if.end
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; CHECK-NEXT: pop {r7, pc}
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entry:
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%a = and i32 %x, 255
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%cmp = icmp eq i32 %a, 17
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br i1 %cmp, label %if.end, label %if.then
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if.then:
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tail call void %f()
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br label %if.end
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if.end:
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ret void
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}
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define void @test5(i32 %x, void ()* %f) {
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; CHECK-LABEL: test5:
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; CHECK: @ %bb.0: @ %entry
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; CHECK-NEXT: .save {r7, lr}
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; CHECK-NEXT: push {r7, lr}
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; CHECK-NEXT: uxth r0, r0
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; CHECK-NEXT: cmp r0, #17
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; CHECK-NEXT: beq .LBB4_2
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; CHECK-NEXT: @ %bb.1: @ %if.then
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; CHECK-NEXT: blx r1
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; CHECK-NEXT: .LBB4_2: @ %if.end
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; CHECK-NEXT: pop {r7, pc}
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entry:
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%a = and i32 %x, 65535
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%cmp = icmp eq i32 %a, 17
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br i1 %cmp, label %if.end, label %if.then
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if.then:
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tail call void %f()
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br label %if.end
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if.end:
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ret void
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}
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define void @test6(i32 %x, void ()* %f) {
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; CHECK-LABEL: test6:
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; CHECK: @ %bb.0: @ %entry
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; CHECK-NEXT: .save {r7, lr}
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; CHECK-NEXT: push {r7, lr}
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; CHECK-NEXT: movs r2, #32
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; CHECK-NEXT: ands r2, r0
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; CHECK-NEXT: cmp r2, #17
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; CHECK-NEXT: beq .LBB5_2
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; CHECK-NEXT: @ %bb.1: @ %if.then
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; CHECK-NEXT: blx r1
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; CHECK-NEXT: .LBB5_2: @ %if.end
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; CHECK-NEXT: pop {r7, pc}
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entry:
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%a = and i32 %x, 32
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%cmp = icmp eq i32 %a, 17
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br i1 %cmp, label %if.end, label %if.then
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if.then:
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tail call void %f()
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br label %if.end
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if.end:
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ret void
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}
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define void @test7(i32 %x, void ()* %f) {
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; CHECK-LABEL: test7:
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; CHECK: @ %bb.0: @ %entry
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; CHECK-NEXT: .save {r7, lr}
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; CHECK-NEXT: push {r7, lr}
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; CHECK-NEXT: ldr r2, .LCPI6_0
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; CHECK-NEXT: ands r2, r0
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; CHECK-NEXT: cmp r2, #17
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; CHECK-NEXT: beq .LBB6_2
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; CHECK-NEXT: @ %bb.1: @ %if.then
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; CHECK-NEXT: blx r1
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; CHECK-NEXT: .LBB6_2: @ %if.end
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; CHECK-NEXT: pop {r7, pc}
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; CHECK-NEXT: .p2align 2
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; CHECK-NEXT: @ %bb.3:
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; CHECK-NEXT: .LCPI6_0:
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; CHECK-NEXT: .long 1023 @ 0x3ff
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entry:
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%a = and i32 %x, 1023
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%cmp = icmp eq i32 %a, 17
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br i1 %cmp, label %if.end, label %if.then
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if.then:
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tail call void %f()
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br label %if.end
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if.end:
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ret void
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}
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define void @test8(i32 %x, void ()* %f) {
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; CHECK-LABEL: test8:
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; CHECK: @ %bb.0: @ %entry
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; CHECK-NEXT: .save {r7, lr}
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; CHECK-NEXT: push {r7, lr}
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; CHECK-NEXT: movs r2, #129
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; CHECK-NEXT: lsls r2, r2, #23
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; CHECK-NEXT: lsls r0, r0, #22
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; CHECK-NEXT: cmp r0, r2
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; CHECK-NEXT: beq .LBB7_2
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; CHECK-NEXT: @ %bb.1: @ %if.then
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; CHECK-NEXT: blx r1
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; CHECK-NEXT: .LBB7_2: @ %if.end
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; CHECK-NEXT: pop {r7, pc}
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entry:
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%a = and i32 %x, 1023
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%cmp = icmp eq i32 %a, 258
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br i1 %cmp, label %if.end, label %if.then
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if.then:
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tail call void %f()
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br label %if.end
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if.end:
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ret void
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}
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