31 lines
848 B
LLVM
31 lines
848 B
LLVM
; RUN: llc < %s -mtriple=x86_64-linux-gnux32 | FileCheck %s
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; RUN: llc < %s -mtriple=x86_64-linux-gnux32 -fast-isel | FileCheck %s
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; Test calling function pointer passed in struct
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; The function argument `h' in
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; struct foo {
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; void (*f) (void);
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; int i;
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; };
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; void
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; bar (struct foo h)
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; {
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; h.f ();
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; }
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; is passed in the 64-bit %rdi register. The `f' field is in the lower 32
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; bits of %rdi register and the `i' field is in the upper 32 bits of %rdi
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; register. We need to zero-extend %edi to %rdi before branching via %rdi.
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define void @bar(i64 %h.coerce) nounwind {
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entry:
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%h.sroa.0.0.extract.trunc = trunc i64 %h.coerce to i32
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%0 = inttoptr i32 %h.sroa.0.0.extract.trunc to void ()*
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; CHECK: movl %edi, %e[[REG:.*]]
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tail call void %0() nounwind
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; CHECK: jmpq *%r[[REG]]
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ret void
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}
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