diff options
| author | Chris Lattner <sabre@nondot.org> | 2011-01-03 21:03:33 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2011-01-03 21:03:33 +0000 |
| commit | 16e42128c24f5df8a61cfd2e6cdf3bd3966db0c5 (patch) | |
| tree | 5dfc380adc19d64738b91972f2767124a8797ae1 /llvm/test/Analysis/BasicAA | |
| parent | 12fa3c6a94af24ef5029fbd65723128aa9875226 (diff) | |
| download | bcm5719-llvm-16e42128c24f5df8a61cfd2e6cdf3bd3966db0c5.tar.gz bcm5719-llvm-16e42128c24f5df8a61cfd2e6cdf3bd3966db0c5.zip | |
fix rdar://8813415 - a miscompilation of 164.gzip that loop-idiom
exposed. It turns out to be a latent bug in basicaa, scary.
llvm-svn: 122772
Diffstat (limited to 'llvm/test/Analysis/BasicAA')
| -rw-r--r-- | llvm/test/Analysis/BasicAA/global-size.ll | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/llvm/test/Analysis/BasicAA/global-size.ll b/llvm/test/Analysis/BasicAA/global-size.ll index 810322e54d1..a7e5aab6c1f 100644 --- a/llvm/test/Analysis/BasicAA/global-size.ll +++ b/llvm/test/Analysis/BasicAA/global-size.ll @@ -16,3 +16,25 @@ define i16 @test1(i32* %P) { ; CHECK: ret i16 0 } +; Cannot know anything about the size of this global. +; rdar://8813415 +@window = external global [0 x i8] + +; CHECK: @test2 +define i8 @test2(i32 %tmp79, i32 %w.2, i32 %indvar89) nounwind { + %tmp92 = add i32 %tmp79, %indvar89 + %arrayidx412 = getelementptr [0 x i8]* @window, i32 0, i32 %tmp92 + %tmp93 = add i32 %w.2, %indvar89 + %arrayidx416 = getelementptr [0 x i8]* @window, i32 0, i32 %tmp93 + + %A = load i8* %arrayidx412, align 1 + store i8 4, i8* %arrayidx416, align 1 + + %B = load i8* %arrayidx412, align 1 + %C = sub i8 %A, %B + ret i8 %C + +; CHECK: %B = load i8 +; CHECK: ret i8 %C +} + |
