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Fix the bitcode reader to deserialize nuw/nsw/etc. bits properly in the case

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of a forward-reference, which doesn't use an "abbrev" encoding.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94454 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-01-25 21:55:39 +00:00
parent 718fb59801
commit 26793ed974
2 changed files with 30 additions and 3 deletions
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test/Bitcode/flags.ll
+27
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@@ -0,0 +1,27 @@
; RUN: llvm-as < %s | llvm-dis > %t0
; RUN: opt -S < %s > %t1
; RUN: diff %t0 %t1
; PR6140
; Make sure the flags are serialized/deserialized properly for both
; forward and backward references.
define void @foo() nounwind {
entry:
br label %first
second: ; preds = %first
%u = add nuw i32 %a, 0 ; <i32> [#uses=0]
%s = add nsw i32 %a, 0 ; <i32> [#uses=0]
%us = add nuw nsw i32 %a, 0 ; <i32> [#uses=0]
%z = add i32 %a, 0 ; <i32> [#uses=0]
unreachable
first: ; preds = %entry
%a = bitcast i32 0 to i32 ; <i32> [#uses=8]
%uu = add nuw i32 %a, 0 ; <i32> [#uses=0]
%ss = add nsw i32 %a, 0 ; <i32> [#uses=0]
%uuss = add nuw nsw i32 %a, 0 ; <i32> [#uses=0]
%zz = add i32 %a, 0 ; <i32> [#uses=0]
br label %second
}