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llvm-mirror/test/Transforms/InstCombine/2008-01-14-VarArgTrampoline.ll
Duncan Sands 81e35b4d47 I noticed that the trampoline straightening transformation could
drop attributes on varargs call arguments.  Also, it could generate
invalid IR if the transformed call already had the 'nest' attribute
somewhere (this can never happen for code coming from llvm-gcc,
but it's a theoretical possibility).  Fix both problems.

llvm-svn: 45973
2008-01-14 19:52:09 +00:00

25 lines
1.2 KiB
LLVM

; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep zeroext
%struct.FRAME.nest = type { i32, i32 (...)* }
%struct.__builtin_trampoline = type { [10 x i8] }
declare i8* @llvm.init.trampoline(i8*, i8*, i8*) nounwind
declare i32 @f(%struct.FRAME.nest* nest , ...)
define i32 @nest(i32 %n) {
entry:
%FRAME.0 = alloca %struct.FRAME.nest, align 8 ; <%struct.FRAME.nest*> [#uses=3]
%TRAMP.216 = alloca [10 x i8], align 16 ; <[10 x i8]*> [#uses=1]
%TRAMP.216.sub = getelementptr [10 x i8]* %TRAMP.216, i32 0, i32 0 ; <i8*> [#uses=1]
%tmp3 = getelementptr %struct.FRAME.nest* %FRAME.0, i32 0, i32 0 ; <i32*> [#uses=1]
store i32 %n, i32* %tmp3, align 8
%FRAME.06 = bitcast %struct.FRAME.nest* %FRAME.0 to i8* ; <i8*> [#uses=1]
%tramp = call i8* @llvm.init.trampoline( i8* %TRAMP.216.sub, i8* bitcast (i32 (%struct.FRAME.nest*, ...)* @f to i8*), i8* %FRAME.06 ) ; <i8*> [#uses=1]
%tmp7 = getelementptr %struct.FRAME.nest* %FRAME.0, i32 0, i32 1 ; <i32 (...)**> [#uses=1]
%tmp89 = bitcast i8* %tramp to i32 (...)* ; <i32 (...)*> [#uses=2]
store i32 (...)* %tmp89, i32 (...)** %tmp7, align 8
%tmp2.i = call i32 (...)* %tmp89( i32 zeroext 0 ) ; <i32> [#uses=1]
ret i32 %tmp2.i
}