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Fix reassociate to clear optional flags, such as nsw.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124712 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2011-02-02 02:02:34 +00:00
parent 1e1901a294
commit 46985a1440
3 changed files with 44 additions and 0 deletions
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test/Transforms/Reassociate/optional-flags.ll
+22
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@@ -0,0 +1,22 @@
; RUN: opt -S -reassociate < %s | FileCheck %s
; rdar://8944681
; Reassociate should clear optional flags like nsw when reassociating.
; CHECK: @test0
; CHECK: %y = add i64 %b, %a
; CHECK: %z = add i64 %y, %c
define i64 @test0(i64 %a, i64 %b, i64 %c) {
%y = add nsw i64 %c, %b
%z = add i64 %y, %a
ret i64 %z
}
; CHECK: @test1
; CHECK: %y = add i64 %b, %a
; CHECK: %z = add i64 %y, %c
define i64 @test1(i64 %a, i64 %b, i64 %c) {
%y = add i64 %c, %b
%z = add nsw i64 %y, %a
ret i64 %z
}