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| author | Hal Finkel <hfinkel@anl.gov> | 2013-06-28 20:00:07 +0000 |
|---|---|---|
| committer | Hal Finkel <hfinkel@anl.gov> | 2013-06-28 20:00:07 +0000 |
| commit | 2c77a625b79908f6e1238890caae630d28c48bee (patch) | |
| tree | 16e3da165c33a00d5de0e7d73f0e35b2b2dafb99 /test/CodeGen/PowerPC/rlwimi-and.ll | |
| parent | 3ca4fa7c265b9f42d2c6bad2362c6ba6640d1b92 (diff) | |
| download | external_llvm-2c77a625b79908f6e1238890caae630d28c48bee.zip external_llvm-2c77a625b79908f6e1238890caae630d28c48bee.tar.gz external_llvm-2c77a625b79908f6e1238890caae630d28c48bee.tar.bz2 | |
Fix a PPC rlwimi instruction-selection bug
Under certain (evidently rare) circumstances, this code used to convert OR(a,
AND(x, y)) into OR(a, x). This was incorrect.
While there, I've added a comment to the code immediately above.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185201 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/PowerPC/rlwimi-and.ll')
| -rw-r--r-- | test/CodeGen/PowerPC/rlwimi-and.ll | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/test/CodeGen/PowerPC/rlwimi-and.ll b/test/CodeGen/PowerPC/rlwimi-and.ll new file mode 100644 index 0000000..e20a13f --- /dev/null +++ b/test/CodeGen/PowerPC/rlwimi-and.ll @@ -0,0 +1,44 @@ +; RUN: llc -mcpu=pwr7 < %s | FileCheck %s +target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-v128:128:128-n32:64" +target triple = "powerpc64-bgq-linux" + +define void @test() align 2 { +entry: + br i1 undef, label %codeRepl1, label %codeRepl31 + +codeRepl1: ; preds = %entry + br i1 undef, label %codeRepl4, label %codeRepl29 + +codeRepl4: ; preds = %codeRepl1 + br i1 undef, label %codeRepl12, label %codeRepl17 + +codeRepl12: ; preds = %codeRepl4 + unreachable + +codeRepl17: ; preds = %codeRepl4 + %0 = load i8* undef, align 2 + %1 = and i8 %0, 1 + %not.tobool.i.i.i = icmp eq i8 %1, 0 + %2 = select i1 %not.tobool.i.i.i, i16 0, i16 256 + %3 = load i8* undef, align 1 + %4 = and i8 %3, 1 + %not.tobool.i.1.i.i = icmp eq i8 %4, 0 + %rvml38.sroa.1.1.insert.ext = select i1 %not.tobool.i.1.i.i, i16 0, i16 1 + %rvml38.sroa.0.0.insert.insert = or i16 %rvml38.sroa.1.1.insert.ext, %2 + store i16 %rvml38.sroa.0.0.insert.insert, i16* undef, align 2 + unreachable + +; CHECK: @test +; CHECK-DAG: slwi [[R1:[0-9]+]], +; CHECK-DAG: rlwinm [[R2:[0-9]+]], +; CHECK-DAG: srawi [[R3:[0-9]+]], [[R1]] +; CHECK-DAG: rlwinm [[R4:[0-9]+]], [[R3]], 0, 23, 23 +; CHECK: rlwimi [[R4]], [[R2]], 0, + +codeRepl29: ; preds = %codeRepl1 + unreachable + +codeRepl31: ; preds = %entry + ret void +} + |