diff options
Diffstat (limited to 'test/CodeGen/PowerPC/cmp_elimination.ll')
| -rw-r--r-- | test/CodeGen/PowerPC/cmp_elimination.ll | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/test/CodeGen/PowerPC/cmp_elimination.ll b/test/CodeGen/PowerPC/cmp_elimination.ll index 3251ae2881b..6bc8b8a041c 100644 --- a/test/CodeGen/PowerPC/cmp_elimination.ll +++ b/test/CodeGen/PowerPC/cmp_elimination.ll @@ -1,4 +1,3 @@ -; XFAIL: * ; RUN: llc -verify-machineinstrs < %s -mtriple=powerpc64-unknown-linux-gnu | FileCheck %s ; RUN: llc -verify-machineinstrs < %s -mtriple=powerpc64le-unknown-linux-gnu | FileCheck %s @@ -748,6 +747,37 @@ do.end: ret void } +define void @func29(i32 signext %a) { +; We cannot merge two compares due to difference in sign extension behaviors. +; equivalent C code example: +; int a = .. ; +; if (a == -1) dummy1(); +; if (a == (uint16_t)-1) dummy2(); + +; CHECK-LABEL: @func29 +; CHECK: cmp +; CHECK: cmp +; CHECK: blr +entry: + %cmp = icmp eq i32 %a, -1 + br i1 %cmp, label %if.then, label %if.else + +if.then: + tail call void @dummy1() + br label %if.end3 + +if.else: + %cmp1 = icmp eq i32 %a, 65535 + br i1 %cmp1, label %if.then2, label %if.end3 + +if.then2: + tail call void @dummy2() + br label %if.end3 + +if.end3: + ret void +} + declare void @dummy1() declare void @dummy2() declare void @dummy3() |