diff options
| author | Hal Finkel <hfinkel@anl.gov> | 2014-12-25 23:08:25 +0000 |
|---|---|---|
| committer | Hal Finkel <hfinkel@anl.gov> | 2014-12-25 23:08:25 +0000 |
| commit | 0c505b08a53a8cd96124264512f4bdf81e648f72 (patch) | |
| tree | ccd63c8bf37335d1ae6efd7f87d33025896c2cfd /llvm/test/CodeGen | |
| parent | b723834d82961103dcaf75dd8fa98eb81ca092ff (diff) | |
| download | bcm5719-llvm-0c505b08a53a8cd96124264512f4bdf81e648f72.tar.gz bcm5719-llvm-0c505b08a53a8cd96124264512f4bdf81e648f72.zip | |
[PowerPC] [FastISel] i1 constants must be zero extended
When materializing constant i1 values, they must be zero extended. We represent
i1 values as [0, 1], not [0, -1], in i32 registers. As it turns out, this code
path was dead for i1 values prior to r216006 (which is why this did not manifest in
miscompiles until recently).
Fixes -O0 self-hosting on PPC64/Linux.
llvm-svn: 224842
Diffstat (limited to 'llvm/test/CodeGen')
| -rw-r--r-- | llvm/test/CodeGen/PowerPC/fast-isel-const.ll | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/PowerPC/fast-isel-const.ll b/llvm/test/CodeGen/PowerPC/fast-isel-const.ll new file mode 100644 index 00000000000..1057d0a0ce2 --- /dev/null +++ b/llvm/test/CodeGen/PowerPC/fast-isel-const.ll @@ -0,0 +1,27 @@ +; RUN: llc < %s -O0 -verify-machineinstrs -fast-isel-abort -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 -mattr=-vsx | FileCheck %s --check-prefix=ELF64 + +define zeroext i1 @testi1(i8 %in) nounwind uwtable ssp { +entry: + %c = icmp eq i8 %in, 5 + br i1 %c, label %true, label %false + +; ELF64-LABEL: @testi1 + +true: + br label %end + +; ELF64-NOT: li {{[0-9]+}}, -1 +; ELF64: li {{[0-9]+}}, 1 + +false: + br label %end + +; ELF64: li {{[0-9]+}}, 0 + +end: + %r = phi i1 [ 0, %false], [ 1, %true ] + ret i1 %r + +; ELF64: blr +} + |
