1 ; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu -mcpu=pwr8 < %s | FileCheck %s 2 ; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr8 < %s | FileCheck %s 3 4 ; bitfieldinsert32: Test for rlwimi 5 ; equivalent C code 6 ; struct s32 { 7 ; int a:8; 8 ; int b:16; 9 ; int c:8; 10 ; }; 11 ; void bitfieldinsert32(struct s32 *p, unsigned int v) { 12 ; p->b = v; 13 ; } 14 15 %struct.s32 = type { i32 } 16 17 define void @bitfieldinsert32(%struct.s32* nocapture %p, i32 zeroext %v) { 18 ; CHECK-LABEL: @bitfieldinsert32 19 ; CHECK: lwz [[REG1:[0-9]+]], 0(3) 20 ; CHECK: rlwimi [[REG1]], 4, 8, 8, 23 21 ; CHECK: stw [[REG1]], 0(3) 22 ; CHECK: blr 23 entry: 24 %0 = getelementptr inbounds %struct.s32, %struct.s32* %p, i64 0, i32 0 25 %bf.load = load i32, i32* %0, align 4 26 %bf.value = shl i32 %v, 8 27 %bf.shl = and i32 %bf.value, 16776960 28 %bf.clear = and i32 %bf.load, -16776961 29 %bf.set = or i32 %bf.clear, %bf.shl 30 store i32 %bf.set, i32* %0, align 4 31 ret void 32 } 33 34
