mirror of
https://github.com/RPCS3/llvm-mirror.git
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3d8bddc9b0
Resubmit r295336 after the bug with non-zero offset patterns on BE targets is fixed (r296336).
Support {a|s}ext, {a|z|s}ext load nodes as a part of load combine patters.
Reviewed By: filcab
Differential Revision: https://reviews.llvm.org/D29591
llvm-svn: 296651
549 lines
18 KiB
LLVM
549 lines
18 KiB
LLVM
; RUN: llc < %s -mtriple=arm64-unknown | FileCheck %s
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; i8* p; // p is 1 byte aligned
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; (i32) p[0] | ((i32) p[1] << 8) | ((i32) p[2] << 16) | ((i32) p[3] << 24)
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define i32 @load_i32_by_i8_unaligned(i32* %arg) {
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; CHECK-LABEL: load_i32_by_i8_unaligned:
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; CHECK: ldr w0, [x0]
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; CHECK-NEXT: ret
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%tmp = bitcast i32* %arg to i8*
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%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 0
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%tmp2 = load i8, i8* %tmp, align 1
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%tmp3 = zext i8 %tmp2 to i32
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%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 1
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%tmp5 = load i8, i8* %tmp4, align 1
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%tmp6 = zext i8 %tmp5 to i32
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%tmp7 = shl nuw nsw i32 %tmp6, 8
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%tmp8 = or i32 %tmp7, %tmp3
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%tmp9 = getelementptr inbounds i8, i8* %tmp, i32 2
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%tmp10 = load i8, i8* %tmp9, align 1
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%tmp11 = zext i8 %tmp10 to i32
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%tmp12 = shl nuw nsw i32 %tmp11, 16
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%tmp13 = or i32 %tmp8, %tmp12
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%tmp14 = getelementptr inbounds i8, i8* %tmp, i32 3
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%tmp15 = load i8, i8* %tmp14, align 1
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%tmp16 = zext i8 %tmp15 to i32
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%tmp17 = shl nuw nsw i32 %tmp16, 24
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%tmp18 = or i32 %tmp13, %tmp17
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ret i32 %tmp18
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}
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; i8* p; // p is 4 byte aligned
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; (i32) p[0] | ((i32) p[1] << 8) | ((i32) p[2] << 16) | ((i32) p[3] << 24)
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define i32 @load_i32_by_i8_aligned(i32* %arg) {
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; CHECK-LABEL: load_i32_by_i8_aligned:
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; CHECK: ldr w0, [x0]
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; CHECK-NEXT: ret
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%tmp = bitcast i32* %arg to i8*
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%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 0
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%tmp2 = load i8, i8* %tmp, align 4
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%tmp3 = zext i8 %tmp2 to i32
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%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 1
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%tmp5 = load i8, i8* %tmp4, align 1
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%tmp6 = zext i8 %tmp5 to i32
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%tmp7 = shl nuw nsw i32 %tmp6, 8
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%tmp8 = or i32 %tmp7, %tmp3
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%tmp9 = getelementptr inbounds i8, i8* %tmp, i32 2
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%tmp10 = load i8, i8* %tmp9, align 1
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%tmp11 = zext i8 %tmp10 to i32
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%tmp12 = shl nuw nsw i32 %tmp11, 16
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%tmp13 = or i32 %tmp8, %tmp12
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%tmp14 = getelementptr inbounds i8, i8* %tmp, i32 3
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%tmp15 = load i8, i8* %tmp14, align 1
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%tmp16 = zext i8 %tmp15 to i32
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%tmp17 = shl nuw nsw i32 %tmp16, 24
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%tmp18 = or i32 %tmp13, %tmp17
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ret i32 %tmp18
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}
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; i8* p; // p is 4 byte aligned
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; ((i32) p[0] << 24) | ((i32) p[1] << 16) | ((i32) p[2] << 8) | (i32) p[3]
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define i32 @load_i32_by_i8_bswap(i32* %arg) {
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; CHECK-LABEL: load_i32_by_i8_bswap:
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; CHECK: ldr w8, [x0]
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; CHECK-NEXT: rev w0, w8
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; CHECK-NEXT: ret
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%tmp = bitcast i32* %arg to i8*
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%tmp1 = load i8, i8* %tmp, align 4
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%tmp2 = zext i8 %tmp1 to i32
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%tmp3 = shl nuw nsw i32 %tmp2, 24
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%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 1
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%tmp5 = load i8, i8* %tmp4, align 1
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%tmp6 = zext i8 %tmp5 to i32
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%tmp7 = shl nuw nsw i32 %tmp6, 16
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%tmp8 = or i32 %tmp7, %tmp3
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%tmp9 = getelementptr inbounds i8, i8* %tmp, i32 2
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%tmp10 = load i8, i8* %tmp9, align 1
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%tmp11 = zext i8 %tmp10 to i32
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%tmp12 = shl nuw nsw i32 %tmp11, 8
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%tmp13 = or i32 %tmp8, %tmp12
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%tmp14 = getelementptr inbounds i8, i8* %tmp, i32 3
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%tmp15 = load i8, i8* %tmp14, align 1
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%tmp16 = zext i8 %tmp15 to i32
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%tmp17 = or i32 %tmp13, %tmp16
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ret i32 %tmp17
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}
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; i8* p; // p is 8 byte aligned
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; (i64) p[0] | ((i64) p[1] << 8) | ((i64) p[2] << 16) | ((i64) p[3] << 24) | ((i64) p[4] << 32) | ((i64) p[5] << 40) | ((i64) p[6] << 48) | ((i64) p[7] << 56)
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define i64 @load_i64_by_i8(i64* %arg) {
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; CHECK-LABEL: load_i64_by_i8:
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; CHECK: ldr x0, [x0]
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; CHECK-NEXT: ret
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%tmp = bitcast i64* %arg to i8*
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%tmp1 = load i8, i8* %tmp, align 8
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%tmp2 = zext i8 %tmp1 to i64
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%tmp3 = getelementptr inbounds i8, i8* %tmp, i64 1
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%tmp4 = load i8, i8* %tmp3, align 1
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%tmp5 = zext i8 %tmp4 to i64
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%tmp6 = shl nuw nsw i64 %tmp5, 8
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%tmp7 = or i64 %tmp6, %tmp2
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%tmp8 = getelementptr inbounds i8, i8* %tmp, i64 2
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%tmp9 = load i8, i8* %tmp8, align 1
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%tmp10 = zext i8 %tmp9 to i64
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%tmp11 = shl nuw nsw i64 %tmp10, 16
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%tmp12 = or i64 %tmp7, %tmp11
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%tmp13 = getelementptr inbounds i8, i8* %tmp, i64 3
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%tmp14 = load i8, i8* %tmp13, align 1
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%tmp15 = zext i8 %tmp14 to i64
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%tmp16 = shl nuw nsw i64 %tmp15, 24
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%tmp17 = or i64 %tmp12, %tmp16
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%tmp18 = getelementptr inbounds i8, i8* %tmp, i64 4
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%tmp19 = load i8, i8* %tmp18, align 1
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%tmp20 = zext i8 %tmp19 to i64
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%tmp21 = shl nuw nsw i64 %tmp20, 32
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%tmp22 = or i64 %tmp17, %tmp21
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%tmp23 = getelementptr inbounds i8, i8* %tmp, i64 5
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%tmp24 = load i8, i8* %tmp23, align 1
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%tmp25 = zext i8 %tmp24 to i64
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%tmp26 = shl nuw nsw i64 %tmp25, 40
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%tmp27 = or i64 %tmp22, %tmp26
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%tmp28 = getelementptr inbounds i8, i8* %tmp, i64 6
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%tmp29 = load i8, i8* %tmp28, align 1
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%tmp30 = zext i8 %tmp29 to i64
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%tmp31 = shl nuw nsw i64 %tmp30, 48
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%tmp32 = or i64 %tmp27, %tmp31
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%tmp33 = getelementptr inbounds i8, i8* %tmp, i64 7
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%tmp34 = load i8, i8* %tmp33, align 1
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%tmp35 = zext i8 %tmp34 to i64
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%tmp36 = shl nuw i64 %tmp35, 56
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%tmp37 = or i64 %tmp32, %tmp36
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ret i64 %tmp37
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}
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; i8* p; // p is 8 byte aligned
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; ((i64) p[0] << 56) | ((i64) p[1] << 48) | ((i64) p[2] << 40) | ((i64) p[3] << 32) | ((i64) p[4] << 24) | ((i64) p[5] << 16) | ((i64) p[6] << 8) | (i64) p[7]
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define i64 @load_i64_by_i8_bswap(i64* %arg) {
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; CHECK-LABEL: load_i64_by_i8_bswap:
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; CHECK: ldr x8, [x0]
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; CHECK-NEXT: rev x0, x8
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; CHECK-NEXT: ret
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%tmp = bitcast i64* %arg to i8*
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%tmp1 = load i8, i8* %tmp, align 8
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%tmp2 = zext i8 %tmp1 to i64
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%tmp3 = shl nuw i64 %tmp2, 56
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%tmp4 = getelementptr inbounds i8, i8* %tmp, i64 1
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%tmp5 = load i8, i8* %tmp4, align 1
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%tmp6 = zext i8 %tmp5 to i64
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%tmp7 = shl nuw nsw i64 %tmp6, 48
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%tmp8 = or i64 %tmp7, %tmp3
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%tmp9 = getelementptr inbounds i8, i8* %tmp, i64 2
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%tmp10 = load i8, i8* %tmp9, align 1
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%tmp11 = zext i8 %tmp10 to i64
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%tmp12 = shl nuw nsw i64 %tmp11, 40
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%tmp13 = or i64 %tmp8, %tmp12
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%tmp14 = getelementptr inbounds i8, i8* %tmp, i64 3
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%tmp15 = load i8, i8* %tmp14, align 1
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%tmp16 = zext i8 %tmp15 to i64
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%tmp17 = shl nuw nsw i64 %tmp16, 32
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%tmp18 = or i64 %tmp13, %tmp17
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%tmp19 = getelementptr inbounds i8, i8* %tmp, i64 4
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%tmp20 = load i8, i8* %tmp19, align 1
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%tmp21 = zext i8 %tmp20 to i64
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%tmp22 = shl nuw nsw i64 %tmp21, 24
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%tmp23 = or i64 %tmp18, %tmp22
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%tmp24 = getelementptr inbounds i8, i8* %tmp, i64 5
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%tmp25 = load i8, i8* %tmp24, align 1
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%tmp26 = zext i8 %tmp25 to i64
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%tmp27 = shl nuw nsw i64 %tmp26, 16
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%tmp28 = or i64 %tmp23, %tmp27
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%tmp29 = getelementptr inbounds i8, i8* %tmp, i64 6
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%tmp30 = load i8, i8* %tmp29, align 1
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%tmp31 = zext i8 %tmp30 to i64
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%tmp32 = shl nuw nsw i64 %tmp31, 8
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%tmp33 = or i64 %tmp28, %tmp32
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%tmp34 = getelementptr inbounds i8, i8* %tmp, i64 7
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%tmp35 = load i8, i8* %tmp34, align 1
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%tmp36 = zext i8 %tmp35 to i64
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%tmp37 = or i64 %tmp33, %tmp36
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ret i64 %tmp37
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}
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; i8* p; // p[1] is 4 byte aligned
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; (i32) p[1] | ((i32) p[2] << 8) | ((i32) p[3] << 16) | ((i32) p[4] << 24)
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define i32 @load_i32_by_i8_nonzero_offset(i32* %arg) {
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; CHECK-LABEL: load_i32_by_i8_nonzero_offset:
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; CHECK: ldur w0, [x0, #1]
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; CHECK-NEXT: ret
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%tmp = bitcast i32* %arg to i8*
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%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 1
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%tmp2 = load i8, i8* %tmp1, align 4
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%tmp3 = zext i8 %tmp2 to i32
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%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 2
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%tmp5 = load i8, i8* %tmp4, align 1
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%tmp6 = zext i8 %tmp5 to i32
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%tmp7 = shl nuw nsw i32 %tmp6, 8
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%tmp8 = or i32 %tmp7, %tmp3
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%tmp9 = getelementptr inbounds i8, i8* %tmp, i32 3
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%tmp10 = load i8, i8* %tmp9, align 1
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%tmp11 = zext i8 %tmp10 to i32
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%tmp12 = shl nuw nsw i32 %tmp11, 16
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%tmp13 = or i32 %tmp8, %tmp12
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%tmp14 = getelementptr inbounds i8, i8* %tmp, i32 4
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%tmp15 = load i8, i8* %tmp14, align 1
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%tmp16 = zext i8 %tmp15 to i32
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%tmp17 = shl nuw nsw i32 %tmp16, 24
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%tmp18 = or i32 %tmp13, %tmp17
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ret i32 %tmp18
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}
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; i8* p; // p[-4] is 4 byte aligned
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; (i32) p[-4] | ((i32) p[-3] << 8) | ((i32) p[-2] << 16) | ((i32) p[-1] << 24)
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define i32 @load_i32_by_i8_neg_offset(i32* %arg) {
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; CHECK-LABEL: load_i32_by_i8_neg_offset:
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; CHECK: ldur w0, [x0, #-4]
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; CHECK-NEXT: ret
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%tmp = bitcast i32* %arg to i8*
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%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 -4
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%tmp2 = load i8, i8* %tmp1, align 4
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%tmp3 = zext i8 %tmp2 to i32
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%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 -3
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%tmp5 = load i8, i8* %tmp4, align 1
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%tmp6 = zext i8 %tmp5 to i32
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%tmp7 = shl nuw nsw i32 %tmp6, 8
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%tmp8 = or i32 %tmp7, %tmp3
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%tmp9 = getelementptr inbounds i8, i8* %tmp, i32 -2
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%tmp10 = load i8, i8* %tmp9, align 1
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%tmp11 = zext i8 %tmp10 to i32
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%tmp12 = shl nuw nsw i32 %tmp11, 16
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%tmp13 = or i32 %tmp8, %tmp12
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%tmp14 = getelementptr inbounds i8, i8* %tmp, i32 -1
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%tmp15 = load i8, i8* %tmp14, align 1
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%tmp16 = zext i8 %tmp15 to i32
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%tmp17 = shl nuw nsw i32 %tmp16, 24
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%tmp18 = or i32 %tmp13, %tmp17
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ret i32 %tmp18
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}
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; i8* p; // p[1] is 4 byte aligned
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; (i32) p[4] | ((i32) p[3] << 8) | ((i32) p[2] << 16) | ((i32) p[1] << 24)
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define i32 @load_i32_by_i8_nonzero_offset_bswap(i32* %arg) {
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; CHECK-LABEL: load_i32_by_i8_nonzero_offset_bswap:
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; CHECK: ldur w8, [x0, #1]
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; CHECK-NEXT: rev w0, w8
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; CHECK-NEXT: ret
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%tmp = bitcast i32* %arg to i8*
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%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 4
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%tmp2 = load i8, i8* %tmp1, align 1
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%tmp3 = zext i8 %tmp2 to i32
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%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 3
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%tmp5 = load i8, i8* %tmp4, align 1
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%tmp6 = zext i8 %tmp5 to i32
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%tmp7 = shl nuw nsw i32 %tmp6, 8
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%tmp8 = or i32 %tmp7, %tmp3
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%tmp9 = getelementptr inbounds i8, i8* %tmp, i32 2
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%tmp10 = load i8, i8* %tmp9, align 1
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%tmp11 = zext i8 %tmp10 to i32
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%tmp12 = shl nuw nsw i32 %tmp11, 16
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%tmp13 = or i32 %tmp8, %tmp12
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%tmp14 = getelementptr inbounds i8, i8* %tmp, i32 1
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%tmp15 = load i8, i8* %tmp14, align 4
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%tmp16 = zext i8 %tmp15 to i32
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%tmp17 = shl nuw nsw i32 %tmp16, 24
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%tmp18 = or i32 %tmp13, %tmp17
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ret i32 %tmp18
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}
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; i8* p; // p[-4] is 4 byte aligned
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; (i32) p[-1] | ((i32) p[-2] << 8) | ((i32) p[-3] << 16) | ((i32) p[-4] << 24)
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define i32 @load_i32_by_i8_neg_offset_bswap(i32* %arg) {
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; CHECK-LABEL: load_i32_by_i8_neg_offset_bswap:
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; CHECK: ldur w8, [x0, #-4]
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; CHECK-NEXT: rev w0, w8
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; CHECK-NEXT: ret
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%tmp = bitcast i32* %arg to i8*
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%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 -1
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%tmp2 = load i8, i8* %tmp1, align 1
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%tmp3 = zext i8 %tmp2 to i32
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%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 -2
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%tmp5 = load i8, i8* %tmp4, align 1
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%tmp6 = zext i8 %tmp5 to i32
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%tmp7 = shl nuw nsw i32 %tmp6, 8
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%tmp8 = or i32 %tmp7, %tmp3
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%tmp9 = getelementptr inbounds i8, i8* %tmp, i32 -3
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%tmp10 = load i8, i8* %tmp9, align 1
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%tmp11 = zext i8 %tmp10 to i32
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%tmp12 = shl nuw nsw i32 %tmp11, 16
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%tmp13 = or i32 %tmp8, %tmp12
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%tmp14 = getelementptr inbounds i8, i8* %tmp, i32 -4
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%tmp15 = load i8, i8* %tmp14, align 4
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%tmp16 = zext i8 %tmp15 to i32
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%tmp17 = shl nuw nsw i32 %tmp16, 24
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%tmp18 = or i32 %tmp13, %tmp17
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ret i32 %tmp18
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}
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declare i16 @llvm.bswap.i16(i16)
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; i16* p; // p is 4 byte aligned
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; (i32) bswap(p[1]) | (i32) bswap(p[0] << 16)
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define i32 @load_i32_by_bswap_i16(i32* %arg) {
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; CHECK-LABEL: load_i32_by_bswap_i16:
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; CHECK: ldr w8, [x0]
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; CHECK-NEXT: rev w0, w8
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; CHECK-NEXT: ret
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%tmp = bitcast i32* %arg to i16*
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%tmp1 = load i16, i16* %tmp, align 4
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%tmp11 = call i16 @llvm.bswap.i16(i16 %tmp1)
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%tmp2 = zext i16 %tmp11 to i32
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%tmp3 = getelementptr inbounds i16, i16* %tmp, i32 1
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%tmp4 = load i16, i16* %tmp3, align 1
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%tmp41 = call i16 @llvm.bswap.i16(i16 %tmp4)
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%tmp5 = zext i16 %tmp41 to i32
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%tmp6 = shl nuw nsw i32 %tmp2, 16
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%tmp7 = or i32 %tmp6, %tmp5
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ret i32 %tmp7
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}
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; i16* p; // p is 4 byte aligned
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; (i32) p[0] | (sext(p[1] << 16) to i32)
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define i32 @load_i32_by_sext_i16(i32* %arg) {
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; CHECK-LABEL: load_i32_by_sext_i16:
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; CHECK: ldr w0, [x0]
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; CHECK-NEXT: ret
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%tmp = bitcast i32* %arg to i16*
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%tmp1 = load i16, i16* %tmp, align 4
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%tmp2 = zext i16 %tmp1 to i32
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%tmp3 = getelementptr inbounds i16, i16* %tmp, i32 1
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%tmp4 = load i16, i16* %tmp3, align 1
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%tmp5 = sext i16 %tmp4 to i32
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%tmp6 = shl nuw nsw i32 %tmp5, 16
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%tmp7 = or i32 %tmp6, %tmp2
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ret i32 %tmp7
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}
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; i8* arg; i32 i;
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; p = arg + 12;
|
|
; (i32) p[i] | ((i32) p[i + 1] << 8) | ((i32) p[i + 2] << 16) | ((i32) p[i + 3] << 24)
|
|
define i32 @load_i32_by_i8_base_offset_index(i8* %arg, i32 %i) {
|
|
; CHECK-LABEL: load_i32_by_i8_base_offset_index:
|
|
; CHECK: add x8, x0, w1, uxtw
|
|
; CHECK-NEXT: ldr w0, [x8, #12]
|
|
; CHECK-NEXT: ret
|
|
%tmp = add nuw nsw i32 %i, 3
|
|
%tmp2 = add nuw nsw i32 %i, 2
|
|
%tmp3 = add nuw nsw i32 %i, 1
|
|
%tmp4 = getelementptr inbounds i8, i8* %arg, i64 12
|
|
%tmp5 = zext i32 %i to i64
|
|
%tmp6 = getelementptr inbounds i8, i8* %tmp4, i64 %tmp5
|
|
%tmp7 = load i8, i8* %tmp6, align 4
|
|
%tmp8 = zext i8 %tmp7 to i32
|
|
%tmp9 = zext i32 %tmp3 to i64
|
|
%tmp10 = getelementptr inbounds i8, i8* %tmp4, i64 %tmp9
|
|
%tmp11 = load i8, i8* %tmp10, align 1
|
|
%tmp12 = zext i8 %tmp11 to i32
|
|
%tmp13 = shl nuw nsw i32 %tmp12, 8
|
|
%tmp14 = or i32 %tmp13, %tmp8
|
|
%tmp15 = zext i32 %tmp2 to i64
|
|
%tmp16 = getelementptr inbounds i8, i8* %tmp4, i64 %tmp15
|
|
%tmp17 = load i8, i8* %tmp16, align 1
|
|
%tmp18 = zext i8 %tmp17 to i32
|
|
%tmp19 = shl nuw nsw i32 %tmp18, 16
|
|
%tmp20 = or i32 %tmp14, %tmp19
|
|
%tmp21 = zext i32 %tmp to i64
|
|
%tmp22 = getelementptr inbounds i8, i8* %tmp4, i64 %tmp21
|
|
%tmp23 = load i8, i8* %tmp22, align 1
|
|
%tmp24 = zext i8 %tmp23 to i32
|
|
%tmp25 = shl nuw i32 %tmp24, 24
|
|
%tmp26 = or i32 %tmp20, %tmp25
|
|
ret i32 %tmp26
|
|
}
|
|
|
|
; i8* arg; i32 i;
|
|
; p = arg + 12;
|
|
; (i32) p[i + 1] | ((i32) p[i + 2] << 8) | ((i32) p[i + 3] << 16) | ((i32) p[i + 4] << 24)
|
|
define i32 @load_i32_by_i8_base_offset_index_2(i8* %arg, i32 %i) {
|
|
; CHECK-LABEL: load_i32_by_i8_base_offset_index_2:
|
|
; CHECK: add x8, x0, w1, uxtw
|
|
; CHECK-NEXT: ldur w0, [x8, #13]
|
|
; CHECK-NEXT: ret
|
|
%tmp = add nuw nsw i32 %i, 4
|
|
%tmp2 = add nuw nsw i32 %i, 3
|
|
%tmp3 = add nuw nsw i32 %i, 2
|
|
%tmp4 = getelementptr inbounds i8, i8* %arg, i64 12
|
|
%tmp5 = add nuw nsw i32 %i, 1
|
|
%tmp27 = zext i32 %tmp5 to i64
|
|
%tmp28 = getelementptr inbounds i8, i8* %tmp4, i64 %tmp27
|
|
%tmp29 = load i8, i8* %tmp28, align 4
|
|
%tmp30 = zext i8 %tmp29 to i32
|
|
%tmp31 = zext i32 %tmp3 to i64
|
|
%tmp32 = getelementptr inbounds i8, i8* %tmp4, i64 %tmp31
|
|
%tmp33 = load i8, i8* %tmp32, align 1
|
|
%tmp34 = zext i8 %tmp33 to i32
|
|
%tmp35 = shl nuw nsw i32 %tmp34, 8
|
|
%tmp36 = or i32 %tmp35, %tmp30
|
|
%tmp37 = zext i32 %tmp2 to i64
|
|
%tmp38 = getelementptr inbounds i8, i8* %tmp4, i64 %tmp37
|
|
%tmp39 = load i8, i8* %tmp38, align 1
|
|
%tmp40 = zext i8 %tmp39 to i32
|
|
%tmp41 = shl nuw nsw i32 %tmp40, 16
|
|
%tmp42 = or i32 %tmp36, %tmp41
|
|
%tmp43 = zext i32 %tmp to i64
|
|
%tmp44 = getelementptr inbounds i8, i8* %tmp4, i64 %tmp43
|
|
%tmp45 = load i8, i8* %tmp44, align 1
|
|
%tmp46 = zext i8 %tmp45 to i32
|
|
%tmp47 = shl nuw i32 %tmp46, 24
|
|
%tmp48 = or i32 %tmp42, %tmp47
|
|
ret i32 %tmp48
|
|
}
|
|
|
|
; i8* p; // p is 2 byte aligned
|
|
; (i32) p[0] | ((i32) p[1] << 8)
|
|
define i32 @zext_load_i32_by_i8(i32* %arg) {
|
|
; CHECK-LABEL: zext_load_i32_by_i8:
|
|
; CHECK: ldrb w8, [x0]
|
|
; CHECK-NEXT: ldrb w9, [x0, #1]
|
|
; CHECK-NEXT: bfi w8, w9, #8, #8
|
|
; CHECK-NEXT: mov w0, w8
|
|
; CHECK-NEXT: ret
|
|
|
|
%tmp = bitcast i32* %arg to i8*
|
|
%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 0
|
|
%tmp2 = load i8, i8* %tmp1, align 2
|
|
%tmp3 = zext i8 %tmp2 to i32
|
|
%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 1
|
|
%tmp5 = load i8, i8* %tmp4, align 1
|
|
%tmp6 = zext i8 %tmp5 to i32
|
|
%tmp7 = shl nuw nsw i32 %tmp6, 8
|
|
%tmp8 = or i32 %tmp7, %tmp3
|
|
ret i32 %tmp8
|
|
}
|
|
|
|
; i8* p; // p is 2 byte aligned
|
|
; ((i32) p[0] << 8) | ((i32) p[1] << 16)
|
|
define i32 @zext_load_i32_by_i8_shl_8(i32* %arg) {
|
|
; CHECK-LABEL: zext_load_i32_by_i8_shl_8:
|
|
; CHECK: ldrb w8, [x0]
|
|
; CHECK-NEXT: ldrb w9, [x0, #1]
|
|
; CHECK-NEXT: lsl w0, w8, #8
|
|
; CHECK-NEXT: bfi w0, w9, #16, #8
|
|
; CHECK-NEXT: ret
|
|
|
|
%tmp = bitcast i32* %arg to i8*
|
|
%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 0
|
|
%tmp2 = load i8, i8* %tmp1, align 2
|
|
%tmp3 = zext i8 %tmp2 to i32
|
|
%tmp30 = shl nuw nsw i32 %tmp3, 8
|
|
%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 1
|
|
%tmp5 = load i8, i8* %tmp4, align 1
|
|
%tmp6 = zext i8 %tmp5 to i32
|
|
%tmp7 = shl nuw nsw i32 %tmp6, 16
|
|
%tmp8 = or i32 %tmp7, %tmp30
|
|
ret i32 %tmp8
|
|
}
|
|
|
|
; i8* p; // p is 2 byte aligned
|
|
; ((i32) p[0] << 16) | ((i32) p[1] << 24)
|
|
define i32 @zext_load_i32_by_i8_shl_16(i32* %arg) {
|
|
; CHECK-LABEL: zext_load_i32_by_i8_shl_16:
|
|
; CHECK: ldrb w8, [x0]
|
|
; CHECK-NEXT: ldrb w9, [x0, #1]
|
|
; CHECK-NEXT: lsl w0, w8, #16
|
|
; CHECK-NEXT: bfi w0, w9, #24, #8
|
|
; CHECK-NEXT: ret
|
|
|
|
%tmp = bitcast i32* %arg to i8*
|
|
%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 0
|
|
%tmp2 = load i8, i8* %tmp1, align 2
|
|
%tmp3 = zext i8 %tmp2 to i32
|
|
%tmp30 = shl nuw nsw i32 %tmp3, 16
|
|
%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 1
|
|
%tmp5 = load i8, i8* %tmp4, align 1
|
|
%tmp6 = zext i8 %tmp5 to i32
|
|
%tmp7 = shl nuw nsw i32 %tmp6, 24
|
|
%tmp8 = or i32 %tmp7, %tmp30
|
|
ret i32 %tmp8
|
|
}
|
|
; i8* p; // p is 2 byte aligned
|
|
; (i32) p[1] | ((i32) p[0] << 8)
|
|
define i32 @zext_load_i32_by_i8_bswap(i32* %arg) {
|
|
; CHECK-LABEL: zext_load_i32_by_i8_bswap:
|
|
; CHECK: ldrb w8, [x0, #1]
|
|
; CHECK-NEXT: ldrb w9, [x0]
|
|
; CHECK-NEXT: bfi w8, w9, #8, #8
|
|
; CHECK-NEXT: mov w0, w8
|
|
; CHECK-NEXT: ret
|
|
|
|
%tmp = bitcast i32* %arg to i8*
|
|
%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 1
|
|
%tmp2 = load i8, i8* %tmp1, align 1
|
|
%tmp3 = zext i8 %tmp2 to i32
|
|
%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 0
|
|
%tmp5 = load i8, i8* %tmp4, align 2
|
|
%tmp6 = zext i8 %tmp5 to i32
|
|
%tmp7 = shl nuw nsw i32 %tmp6, 8
|
|
%tmp8 = or i32 %tmp7, %tmp3
|
|
ret i32 %tmp8
|
|
}
|
|
|
|
; i8* p; // p is 2 byte aligned
|
|
; ((i32) p[1] << 8) | ((i32) p[0] << 16)
|
|
define i32 @zext_load_i32_by_i8_bswap_shl_8(i32* %arg) {
|
|
; CHECK-LABEL: zext_load_i32_by_i8_bswap_shl_8:
|
|
; CHECK: ldrb w8, [x0, #1]
|
|
; CHECK-NEXT: ldrb w9, [x0]
|
|
; CHECK-NEXT: lsl w0, w8, #8
|
|
; CHECK-NEXT: bfi w0, w9, #16, #8
|
|
; CHECK-NEXT: ret
|
|
|
|
%tmp = bitcast i32* %arg to i8*
|
|
%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 1
|
|
%tmp2 = load i8, i8* %tmp1, align 1
|
|
%tmp3 = zext i8 %tmp2 to i32
|
|
%tmp30 = shl nuw nsw i32 %tmp3, 8
|
|
%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 0
|
|
%tmp5 = load i8, i8* %tmp4, align 2
|
|
%tmp6 = zext i8 %tmp5 to i32
|
|
%tmp7 = shl nuw nsw i32 %tmp6, 16
|
|
%tmp8 = or i32 %tmp7, %tmp30
|
|
ret i32 %tmp8
|
|
}
|
|
|
|
; i8* p; // p is 2 byte aligned
|
|
; ((i32) p[1] << 16) | ((i32) p[0] << 24)
|
|
define i32 @zext_load_i32_by_i8_bswap_shl_16(i32* %arg) {
|
|
; CHECK-LABEL: zext_load_i32_by_i8_bswap_shl_16:
|
|
; CHECK: ldrb w8, [x0, #1]
|
|
; CHECK-NEXT: ldrb w9, [x0]
|
|
; CHECK-NEXT: lsl w0, w8, #16
|
|
; CHECK-NEXT: bfi w0, w9, #24, #8
|
|
; CHECK-NEXT: ret
|
|
|
|
%tmp = bitcast i32* %arg to i8*
|
|
%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 1
|
|
%tmp2 = load i8, i8* %tmp1, align 1
|
|
%tmp3 = zext i8 %tmp2 to i32
|
|
%tmp30 = shl nuw nsw i32 %tmp3, 16
|
|
%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 0
|
|
%tmp5 = load i8, i8* %tmp4, align 2
|
|
%tmp6 = zext i8 %tmp5 to i32
|
|
%tmp7 = shl nuw nsw i32 %tmp6, 24
|
|
%tmp8 = or i32 %tmp7, %tmp30
|
|
ret i32 %tmp8
|
|
}
|