1; NOTE: This test verifies that a redundant load immediate of zero is folded 2; NOTE: from its use in an isel and deleted as it is no longer in use. 3; RUN: llc -mcpu=pwr9 -mtriple=powerpc64le-unknown-linux-gnu \ 4; RUN: -ppc-asm-full-reg-names -verify-machineinstrs < %s | FileCheck %s 5; RUN: llc -mcpu=pwr9 -mtriple=powerpc64-unknown-linux-gnu \ 6; RUN: -ppc-asm-full-reg-names -verify-machineinstrs < %s | FileCheck %s 7 8%0 = type { i32, i16 } 9 10@val = common dso_local local_unnamed_addr global %0* null, align 8 11 12define dso_local signext i32 @redunLoadImm(%0* %arg) { 13; CHECK-LABEL: redunLoadImm: 14; verify that the load immediate has been folded into the isel and deleted 15; CHECK-NOT: li r[[REG1:[0-9]+]], 0 16; CHECK: iseleq r[[REG2:[0-9]+]], 0, r[[REG3:[0-9]+]] 17 18bb: 19 %tmp = icmp eq %0* %arg, null 20 br i1 %tmp, label %bb9, label %bb1 21 22bb1: ; preds = %bb 23 %tmp2 = getelementptr inbounds %0, %0* %arg, i64 0, i32 1 24 br label %bb3 25 26bb3: ; preds = %bb3, %bb1 27 %tmp4 = load i16, i16* %tmp2, align 4 28 %tmp5 = sext i16 %tmp4 to i64 29 %tmp6 = getelementptr inbounds %0, %0* %arg, i64 %tmp5 30 %tmp7 = icmp eq i16 %tmp4, 0 31 %tmp8 = select i1 %tmp7, %0* null, %0* %tmp6 32 store %0* %tmp8, %0** @val, align 8 33 br label %bb3 34 35bb9: ; preds = %bb 36 %tmp10 = load %0*, %0** @val, align 8 37 %tmp11 = getelementptr inbounds %0, %0* %tmp10, i64 0, i32 0 38 %tmp12 = load i32, i32* %tmp11, align 4 39 ret i32 %tmp12 40} 41