31 lines
1.3 KiB
LLVM
31 lines
1.3 KiB
LLVM
; RUN: llc < %s -mtriple=i686-linux-gnu -mcpu=pentium | FileCheck %s
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; Tail call should not make register allocation fail (x86-32)
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%struct.anon = type { i32 (%struct.BIG_PARM*, i8*)*, i32 ()*, i32 ()*, i32 ()*, i32 ()*, i32 ()*, i32 ()* }
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%struct.BIG_PARM = type { i32 }
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@vtable = internal unnamed_addr constant [1 x %struct.anon] [%struct.anon { i32 (%struct.BIG_PARM*, i8*)* inttoptr (i32 -559038737 to i32 (%struct.BIG_PARM*, i8*)*), i32 ()* null, i32 ()* null, i32 ()* null, i32 ()* null, i32 ()* null, i32 ()* null }], align 4
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; Function Attrs: nounwind uwtable
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define dso_local i32 @something(%struct.BIG_PARM* inreg noundef %a, i8* inreg noundef %b) local_unnamed_addr #0 {
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entry:
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; CHECK: movl (%eax), %ecx
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; CHECK-NEXT: leal (%ecx,%ecx,8), %esi
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; CHECK-NEXT: leal (%esi,%esi,2), %esi
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; CHECK-NEXT: movl vtable(%ecx,%esi), %ecx
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; CHECK-NEXT: popl %esi
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; CHECK: jmpl *%ecx
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%ver = getelementptr inbounds %struct.BIG_PARM, %struct.BIG_PARM* %a, i32 0, i32 0
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%0 = load i32, i32* %ver, align 4
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%foo = getelementptr [1 x %struct.anon], [1 x %struct.anon]* @vtable, i32 0, i32 %0, i32 0
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%1 = load i32 (%struct.BIG_PARM*, i8*)*, i32 (%struct.BIG_PARM*, i8*)** %foo, align 4
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%call = tail call i32 %1(%struct.BIG_PARM* inreg noundef %a, i8* inreg noundef %b) #1
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ret i32 %call
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}
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!llvm.module.flags = !{!0}
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!0 = !{i32 1, !"NumRegisterParameters", i32 3}
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