llvm-6502/test/Transforms/InstCombine/2008-01-14-DoubleNest.ll
Duncan Sands b0c9b93bb4 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45973 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-14 19:52:09 +00:00

25 lines
1.2 KiB
LLVM

; RUN: llvm-as < %s | opt -instcombine -disable-output
%struct.FRAME.nest = type { i32, 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 , i32*)
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*, i32*)* @f to i8*), i8* %FRAME.06 ) ; <i8*> [#uses=1]
%tmp7 = getelementptr %struct.FRAME.nest* %FRAME.0, i32 0, i32 1 ; <i32 (i32*)**> [#uses=1]
%tmp89 = bitcast i8* %tramp to i32 (i32*)* ; <i32 (i32*)*> [#uses=2]
store i32 (i32*)* %tmp89, i32 (i32*)** %tmp7, align 8
%tmp2.i = call i32 %tmp89( i32* nest null ) ; <i32> [#uses=1]
ret i32 %tmp2.i
}