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llvm-project/llvm/test/Transforms/Inline/devirtualize-2.ll

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The inliner was choosing to not consider call sites that appear in the SCC as a result of inlining as candidates for inlining. Change this so that it *does* consider call sites that change from being indirect to being direct as a result of inlining. This allows it to completely "devirtualize" the testcase. llvm-svn: 102146
2010-04-23 07:37:35 +08:00
; RUN: opt < %s -inline -S | FileCheck %s
Fix PR4834, a tricky case where the inliner would resolve an indirect function pointer, inline it, then go to delete the body. The problem is that the callgraph had other references to the function, though the inliner had no way to know it, so we got a dangling pointer and an invalid iterator out of the deal. The fix to this is pretty simple: stop the inliner from deleting the function by knowing that there are references to it. Do this by making CallGraphNodes contain a refcount. This requires moving deletion of available_externally functions to the module-level cleanup sweep where it belongs. llvm-svn: 80533
2009-08-31 11:15:49 +08:00
; PR4834
The inliner was choosing to not consider call sites that appear in the SCC as a result of inlining as candidates for inlining. Change this so that it *does* consider call sites that change from being indirect to being direct as a result of inlining. This allows it to completely "devirtualize" the testcase. llvm-svn: 102146
2010-04-23 07:37:35 +08:00
define i32 @test1() {
Fix PR4834, a tricky case where the inliner would resolve an indirect function pointer, inline it, then go to delete the body. The problem is that the callgraph had other references to the function, though the inliner had no way to know it, so we got a dangling pointer and an invalid iterator out of the deal. The fix to this is pretty simple: stop the inliner from deleting the function by knowing that there are references to it. Do this by making CallGraphNodes contain a refcount. This requires moving deletion of available_externally functions to the module-level cleanup sweep where it belongs. llvm-svn: 80533
2009-08-31 11:15:49 +08:00
%funcall1_ = call fastcc i32 ()* ()* @f1()
%executecommandptr1_ = call i32 %funcall1_()
ret i32 %executecommandptr1_
}
define internal fastcc i32 ()* @f1() nounwind readnone {
ret i32 ()* @f2
}
define internal i32 @f2() nounwind readnone {
ret i32 1
}
The inliner was choosing to not consider call sites that appear in the SCC as a result of inlining as candidates for inlining. Change this so that it *does* consider call sites that change from being indirect to being direct as a result of inlining. This allows it to completely "devirtualize" the testcase. llvm-svn: 102146
2010-04-23 07:37:35 +08:00
; CHECK: @test1()
; CHECK-NEXT: ret i32 1
declare i8* @f1a(i8*) ssp align 2
define internal i32 @f2a(i8* %t) inlinehint ssp {
entry:
ret i32 41
}
define internal i32 @f3a(i32 (i8*)* %__f) ssp {
entry:
%A = call i32 %__f(i8* undef)
ret i32 %A
}
define i32 @test2(i8* %this) ssp align 2 {
%X = call i32 @f3a(i32 (i8*)* @f2a) ssp
ret i32 %X
}
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc" $NAME; then TEMP=`mktemp -t temp` cp $NAME $TEMP sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \ while read FUNC; do sed -i '' "s/;\(.*\)\([A-Za-z0-9_]*\):\( *\)@$FUNC\([( ]*\)\$/;\1\2-LABEL:\3@$FUNC(/g" $TEMP done mv $TEMP $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @test2(
no longer xfail llvm-svn: 102220
2010-04-24 06:39:33 +08:00
; CHECK-NEXT: ret i32 41