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