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Diffstat (limited to 'test/CodeGen/X86/x32-function_pointer-3.ll')
-rw-r--r-- | test/CodeGen/X86/x32-function_pointer-3.ll | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/test/CodeGen/X86/x32-function_pointer-3.ll b/test/CodeGen/X86/x32-function_pointer-3.ll new file mode 100644 index 0000000..5eaf85d --- /dev/null +++ b/test/CodeGen/X86/x32-function_pointer-3.ll @@ -0,0 +1,30 @@ +; RUN: llc < %s -mtriple=x86_64-linux-gnux32 | FileCheck %s +; RUN: llc < %s -mtriple=x86_64-linux-gnux32 -fast-isel | FileCheck %s + +; Test calling function pointer passed in struct + +; The fuction argument `h' in + +; struct foo { +; void (*f) (void); +; int i; +; }; +; void +; bar (struct foo h) +; { +; h.f (); +; } + +; is passed in the 64-bit %rdi register. The `f' field is in the lower 32 +; bits of %rdi register and the `i' field is in the upper 32 bits of %rdi +; register. We need to zero-extend %edi to %rdi before branching via %rdi. + +define void @bar(i64 %h.coerce) nounwind { +entry: + %h.sroa.0.0.extract.trunc = trunc i64 %h.coerce to i32 + %0 = inttoptr i32 %h.sroa.0.0.extract.trunc to void ()* +; CHECK: movl %edi, %e[[REG:.*]] + tail call void %0() nounwind +; CHECK: jmpq *%r[[REG]] + ret void +} |