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| author | Louis Gerbarg <lgg@apple.com> | 2014-04-14 21:05:05 +0000 |
|---|---|---|
| committer | Louis Gerbarg <lgg@apple.com> | 2014-04-14 21:05:05 +0000 |
| commit | 261f0df185a7cf6a8ef18b530833567ce11246e3 (patch) | |
| tree | 48d05e5103436c91e2a72fa09676de98fec9735d /test | |
| parent | 27539d46ccde86358f32226907149083d7a4dcf7 (diff) | |
| download | llvm-261f0df185a7cf6a8ef18b530833567ce11246e3.tar.gz llvm-261f0df185a7cf6a8ef18b530833567ce11246e3.tar.bz2 llvm-261f0df185a7cf6a8ef18b530833567ce11246e3.tar.xz | |
Fix for codegen bug that could cause illegal cmn instruction generation
In rare cases the dead definition elimination pass code can cause illegal cmn
instructions when it replaces dead registers on instructions that use
unmaterialized frame indexes. This patch disables the dead definition
optimization for instructions which include frame index operands.
rdar://16438284
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206208 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/ARM64/dead-def-frame-index.ll | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/test/CodeGen/ARM64/dead-def-frame-index.ll b/test/CodeGen/ARM64/dead-def-frame-index.ll new file mode 100644 index 0000000000..4f8cc859ee --- /dev/null +++ b/test/CodeGen/ARM64/dead-def-frame-index.ll @@ -0,0 +1,18 @@ +; RUN: llc -march=arm64 < %s | FileCheck %s + +target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128" +target triple = "arm64-apple-ios7.0.0" + +; Function Attrs: nounwind ssp uwtable +define i32 @test1() #0 { + %tmp1 = alloca i8 + %tmp2 = alloca i32, i32 4096 + %tmp3 = icmp eq i8* %tmp1, null + %tmp4 = zext i1 %tmp3 to i32 + + ret i32 %tmp4 + + ; CHECK-LABEL: test1 + ; CHECK: adds [[TEMP:[a-z0-9]+]], sp, #16384 + ; CHECK: adds [[TEMP]], [[TEMP]], #15 +} |