2dd883439c
`__stdcall`, `__fastcall` and `__vectorcall` return large values via a hidden pointer argument. However, the size of that argument should not be included in the argument list byte count suffix added to the function's decorated name. This patch fixes that issue so that LLVM generates the same decorated name as MSVC does. MSVC example: https://godbolt.org/z/nc35MKPhr Reviewed By: rnk Differential Revision: https://reviews.llvm.org/D110719
40 lines
1.1 KiB
LLVM
40 lines
1.1 KiB
LLVM
; RUN: llc -mtriple="i386-pc-mingw32" < %s | FileCheck %s
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; PR5851
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%0 = type { void (...)* }
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define internal x86_stdcallcc void @MyFunc() nounwind {
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entry:
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; CHECK: MyFunc@0:
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; CHECK: retl
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ret void
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}
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; PR14410
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define x86_stdcallcc i32 @"\01DoNotMangle"(i32 %a) {
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; CHECK: DoNotMangle:
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; CHECK: retl $4
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entry:
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ret i32 %a
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}
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%struct.large_type = type { i64, i64, i64 }
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define x86_stdcallcc void @ReturnLargeType(%struct.large_type* noalias nocapture sret(%struct.large_type) align 8 %agg.result) {
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; CHECK: ReturnLargeType@0:
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; CHECK: retl
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entry:
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%a = getelementptr inbounds %struct.large_type, %struct.large_type* %agg.result, i32 0, i32 0
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store i64 123, i64* %a, align 8
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%b = getelementptr inbounds %struct.large_type, %struct.large_type* %agg.result, i32 0, i32 1
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store i64 456, i64* %b, align 8
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%c = getelementptr inbounds %struct.large_type, %struct.large_type* %agg.result, i32 0, i32 2
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store i64 789, i64* %c, align 8
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ret void
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}
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@B = global %0 { void (...)* bitcast (void ()* @MyFunc to void (...)*) }, align 4
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; CHECK: _B:
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; CHECK: .long _MyFunc@0
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