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https://github.com/c64scene-ar/llvm-6502.git
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0e13821c96
define void @f() {
...
call i32 @g()
...
}
define void @g() {
...
}
The hazards are:
- @f and @g have GC, but they differ GC. Inlining is invalid. This
may never occur.
- @f has no GC, but @g does. g's GC must be propagated to @f.
The other scenarios are safe:
- @f and @g have the same GC.
- @f and @g have no GC.
- @g has no GC.
This patch adds inliner checks for the former two scenarios.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45351 91177308-0d34-0410-b5e6-96231b3b80d8
24 lines
670 B
LLVM
24 lines
670 B
LLVM
; RUN: llvm-as < %s | opt -inline | llvm-dis | grep example
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%IntArray = type { i32, [0 x i32*] }
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declare void @llvm.gcroot(i8**, i8*) nounwind
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define i32 @f() {
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%x = call i32 @g( ) ; <i32> [#uses=1]
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ret i32 %x
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}
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define internal i32 @g() gc "example" {
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%root = alloca i8* ; <i8**> [#uses=2]
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call void @llvm.gcroot( i8** %root, i8* null )
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%obj = call %IntArray* @h( ) ; <%IntArray*> [#uses=2]
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%obj.2 = bitcast %IntArray* %obj to i8* ; <i8*> [#uses=1]
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store i8* %obj.2, i8** %root
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%Length.ptr = getelementptr %IntArray* %obj, i32 0, i32 0 ; <i32*> [#uses=1]
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%Length = load i32* %Length.ptr ; <i32> [#uses=1]
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ret i32 %Length
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}
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declare %IntArray* @h()
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