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| author | Tom Stellard <thomas.stellard@amd.com> | 2014-04-11 19:35:37 +0000 |
|---|---|---|
| committer | Tom Stellard <thomas.stellard@amd.com> | 2014-04-11 19:35:37 +0000 |
| commit | ffb9f967d83cf680eb1bfea1fdd995ccef34223e (patch) | |
| tree | 4492da57442c30e9c641df2dd83a2f1a969a7995 /test/Transforms | |
| parent | ad17ccef24b2078275201d62c1feaa1aad6be8e3 (diff) | |
| download | llvm-ffb9f967d83cf680eb1bfea1fdd995ccef34223e.tar.gz llvm-ffb9f967d83cf680eb1bfea1fdd995ccef34223e.tar.bz2 llvm-ffb9f967d83cf680eb1bfea1fdd995ccef34223e.tar.xz | |
Merging r198290:
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r198290 | aschwaighofer | 2014-01-01 22:31:36 -0500 (Wed, 01 Jan 2014) | 23 lines
BasicAA: Fix value equality and phi cycles
When there are cycles in the value graph we have to be careful interpreting
"Value*" identity as "value" equivalence. We interpret the value of a phi node
as the value of its operands.
When we check for value equivalence now we make sure that the "Value*" dominates
all cycles (phis).
%0 = phi [%noaliasval, %addr2]
%l = load %ptr
%addr1 = gep @a, 0, %l
%addr2 = gep @a, 0, (%l + 1)
store %ptr ...
Before this patch we would return NoAlias for (%0, %addr1) which is wrong
because the value of the load is from different iterations of the loop.
Tested on x86_64 -mavx at O3 and O3 -flto with no performance or compile time
regressions.
PR18068
radar://15653794
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_34@206051 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms')
| -rw-r--r-- | test/Transforms/ObjCARC/weak-copies.ll | 2 | ||||
| -rw-r--r-- | test/Transforms/ObjCARC/weak-dce.ll | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/test/Transforms/ObjCARC/weak-copies.ll b/test/Transforms/ObjCARC/weak-copies.ll index 5dab4e049e..599689bc36 100644 --- a/test/Transforms/ObjCARC/weak-copies.ll +++ b/test/Transforms/ObjCARC/weak-copies.ll @@ -1,4 +1,4 @@ -; RUN: opt -S -basicaa -objc-arc < %s | FileCheck %s +; RUN: opt -S -domtree -basicaa -objc-arc < %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-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64" target triple = "x86_64-apple-darwin11.0.0" diff --git a/test/Transforms/ObjCARC/weak-dce.ll b/test/Transforms/ObjCARC/weak-dce.ll index f09467182b..787fb905fd 100644 --- a/test/Transforms/ObjCARC/weak-dce.ll +++ b/test/Transforms/ObjCARC/weak-dce.ll @@ -1,4 +1,4 @@ -; RUN: opt -S -basicaa -objc-arc < %s | FileCheck %s +; RUN: opt -S -domtree -basicaa -objc-arc < %s | FileCheck %s ; rdar://11434915 ; Delete the weak calls and replace them with just the net retain. |