From d0e277d272d517ca1cda368267d199f0da7cad95 Mon Sep 17 00:00:00 2001
From: Jim Grosbach <grosbach@apple.com>
Date: Wed, 1 Feb 2012 00:08:17 +0000
Subject: Disable InstCombine unsafe folding bitcasts of calls w/ varargs.

Changing arguments from being passed as fixed to varargs is unsafe, as
the ABI may require they be handled differently (stack vs. register, for
example).

Remove two tests which rely on the bitcast being folded into the direct
call, which is exactly the transformation that's unsafe.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149457 91177308-0d34-0410-b5e6-96231b3b80d8
---
 .../InstCombine/2008-01-06-BitCastAttributes.ll    | 23 ----------------------
 test/Transforms/InstCombine/call.ll                | 14 -------------
 2 files changed, 37 deletions(-)
 delete mode 100644 test/Transforms/InstCombine/2008-01-06-BitCastAttributes.ll

(limited to 'test')

diff --git a/test/Transforms/InstCombine/2008-01-06-BitCastAttributes.ll b/test/Transforms/InstCombine/2008-01-06-BitCastAttributes.ll
deleted file mode 100644
index 23b6067..0000000
--- a/test/Transforms/InstCombine/2008-01-06-BitCastAttributes.ll
+++ /dev/null
@@ -1,23 +0,0 @@
-; Ignore stderr, we expect warnings there
-; RUN: opt < %s -instcombine 2> /dev/null -S | not grep bitcast
-
-define void @a() {
-	ret void
-}
-
-define signext i32 @b(i32* inreg  %x)   {
-	ret i32 0
-}
-
-define void @c(...) {
-	ret void
-}
-
-define void @g(i32* %y) {
-	call void bitcast (void ()* @a to void (i32*)*)( i32* noalias  %y )
-	call <2 x i32> bitcast (i32 (i32*)* @b to <2 x i32> (i32*)*)( i32* inreg  null )		; <<2 x i32>>:1 [#uses=0]
-	%x = call i64 bitcast (i32 (i32*)* @b to i64 (i32)*)( i32 0 )		; <i64> [#uses=0]
-	call void bitcast (void (...)* @c to void (i32)*)( i32 0 )
-	call void bitcast (void (...)* @c to void (i32)*)( i32 zeroext  0 )
-	ret void
-}
diff --git a/test/Transforms/InstCombine/call.ll b/test/Transforms/InstCombine/call.ll
index 96ec420..ca36484 100644
--- a/test/Transforms/InstCombine/call.ll
+++ b/test/Transforms/InstCombine/call.ll
@@ -30,20 +30,6 @@ define i32 @test2(i32 %A) {
 }
 
 
-; Resolving this should insert a cast from sbyte to int, following the C 
-; promotion rules.
-define void @test3a(i8, ...) {unreachable }
-
-define void @test3(i8 %A, i8 %B) {
-        call void bitcast (void (i8, ...)* @test3a to void (i8, i8)*)( i8 %A, i8 %B 
-)
-        ret void
-; CHECK: %1 = zext i8 %B to i32
-; CHECK: call void (i8, ...)* @test3a(i8 %A, i32 %1)
-; CHECK: ret void
-}
-
-
 ; test conversion of return value...
 define i8 @test4a() {
         ret i8 0
-- 
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