34 lines
979 B
LLVM
34 lines
979 B
LLVM
; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu -mcpu=pwr8 < %s | FileCheck %s
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; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr8 < %s | FileCheck %s
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; bitfieldinsert32: Test for rlwimi
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; equivalent C code
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; struct s32 {
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; int a:8;
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; int b:16;
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; int c:8;
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; };
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; void bitfieldinsert32(struct s32 *p, unsigned int v) {
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; p->b = v;
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; }
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%struct.s32 = type { i32 }
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define void @bitfieldinsert32(%struct.s32* nocapture %p, i32 zeroext %v) {
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; CHECK-LABEL: @bitfieldinsert32
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; CHECK: lwz [[REG1:[0-9]+]], 0(3)
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; CHECK: rlwimi [[REG1]], 4, 8, 8, 23
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; CHECK: stw [[REG1]], 0(3)
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; CHECK: blr
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entry:
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%0 = getelementptr inbounds %struct.s32, %struct.s32* %p, i64 0, i32 0
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%bf.load = load i32, i32* %0, align 4
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%bf.value = shl i32 %v, 8
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%bf.shl = and i32 %bf.value, 16776960
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%bf.clear = and i32 %bf.load, -16776961
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%bf.set = or i32 %bf.clear, %bf.shl
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store i32 %bf.set, i32* %0, align 4
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ret void
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}
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