| ; NOTE: This test verifies that a redundant load immediate of zero is folded |
| ; NOTE: from its use in an isel and deleted as it is no longer in use. |
| ; RUN: llc -mcpu=pwr9 -mtriple=powerpc64le-unknown-linux-gnu \ |
| ; RUN: -ppc-asm-full-reg-names -verify-machineinstrs < %s | FileCheck %s |
| ; RUN: llc -mcpu=pwr9 -mtriple=powerpc64-unknown-linux-gnu \ |
| ; RUN: -ppc-asm-full-reg-names -verify-machineinstrs < %s | FileCheck %s |
| |
| %0 = type { i32, i16 } |
| |
| @val = common dso_local local_unnamed_addr global %0* null, align 8 |
| |
| define dso_local signext i32 @redunLoadImm(%0* %arg) { |
| ; CHECK-LABEL: redunLoadImm: |
| ; verify that the load immediate has been folded into the isel and deleted |
| ; CHECK-NOT: li r[[REG1:[0-9]+]], 0 |
| ; CHECK: iseleq r[[REG2:[0-9]+]], 0, r[[REG3:[0-9]+]] |
| |
| bb: |
| %tmp = icmp eq %0* %arg, null |
| br i1 %tmp, label %bb9, label %bb1 |
| |
| bb1: ; preds = %bb |
| %tmp2 = getelementptr inbounds %0, %0* %arg, i64 0, i32 1 |
| br label %bb3 |
| |
| bb3: ; preds = %bb3, %bb1 |
| %tmp4 = load i16, i16* %tmp2, align 4 |
| %tmp5 = sext i16 %tmp4 to i64 |
| %tmp6 = getelementptr inbounds %0, %0* %arg, i64 %tmp5 |
| %tmp7 = icmp eq i16 %tmp4, 0 |
| %tmp8 = select i1 %tmp7, %0* null, %0* %tmp6 |
| store %0* %tmp8, %0** @val, align 8 |
| br label %bb3 |
| |
| bb9: ; preds = %bb |
| %tmp10 = load %0*, %0** @val, align 8 |
| %tmp11 = getelementptr inbounds %0, %0* %tmp10, i64 0, i32 0 |
| %tmp12 = load i32, i32* %tmp11, align 4 |
| ret i32 %tmp12 |
| } |
