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
10 @val = common dso_local local_unnamed_addr global ptr null, align 8
12 define dso_local signext i32 @redunLoadImm(ptr %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]+]]
19 %tmp = icmp eq ptr %arg, null
20 br i1 %tmp, label %bb9, label %bb1
23 %tmp2 = getelementptr inbounds %0, ptr %arg, i64 0, i32 1
26 bb3: ; preds = %bb3, %bb1
27 %tmp4 = load i16, ptr %tmp2, align 4
28 %tmp5 = sext i16 %tmp4 to i64
29 %tmp6 = getelementptr inbounds %0, ptr %arg, i64 %tmp5
30 %tmp7 = icmp eq i16 %tmp4, 0
31 %tmp8 = select i1 %tmp7, ptr null, ptr %tmp6
32 store ptr %tmp8, ptr @val, align 8
36 %tmp10 = load ptr, ptr @val, align 8
37 %tmp12 = load i32, ptr %tmp10, align 4