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Revert "Divide the primitive size in bits by eight so the initial load's alignment is in bytes as expected. Tested with the included unit test."

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This reverts commit r244155, as it was breaking the buildbots for too long.
Should be reapplied with proper fix.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244205 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Renato Golin 2015-08-06 10:37:59 +00:00
parent 47e91a8102
commit 7809bb2e96
2 changed files with 1 additions and 9 deletions
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2
lib/CodeGen/AtomicExpandPass.cpp
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@ -550,7 +550,7 @@ bool llvm::expandAtomicRMWToCmpXchg(AtomicRMWInst *AI,
Builder.SetInsertPoint(BB);
LoadInst *InitLoaded = Builder.CreateLoad(Addr);
// Atomics require at least natural alignment.
InitLoaded->setAlignment(AI->getType()->getPrimitiveSizeInBits() / 8);
InitLoaded->setAlignment(AI->getType()->getPrimitiveSizeInBits());
Builder.CreateBr(LoopBB);
// Start the main loop block now that we've taken care of the preliminaries.

8
test/Transforms/AtomicExpand/expand-atomic-rmw-initial-load.ll
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@ -1,8 +0,0 @@
; RUN: opt -S %s -atomic-expand -mtriple=i686-linux-gnu | FileCheck %s
define i8 @test_initial_load(i8* %ptr, i8 %value) {
%res = atomicrmw nand i8* %ptr, i8 %value seq_cst
ret i8 %res
}
; CHECK-LABEL: @test_initial_load
; CHECK-NEXT: %1 = load i8, i8* %ptr, align 1