1; RUN: llc -O0 -mtriple=i386-unknown-linux-gnu -relocation-model=pic < %s | FileCheck %s 2 3; Unbind the ebx with GOT address in regcall calling convention, or the following 4; case will failed in register allocation by no register can be used. 5 6;#define REGCALL __attribute__((regcall)) 7;int REGCALL func (int i1, int i2, int i3, int i4, int i5); 8;int (REGCALL *fptr) (int, int, int, int, int) = func; 9;int test() { 10; return fptr(1,2,3,4,5); 11;} 12 13@fptr = global i32 (i32, i32, i32, i32, i32)* @__regcall3__func, align 4 14 15declare x86_regcallcc i32 @__regcall3__func(i32 inreg, i32 inreg, i32 inreg, i32 inreg, i32 inreg) 16 17; Function Attrs: noinline nounwind optnone 18define i32 @test() { 19; CHECK-LABEL: test: 20; CHECK: .L0$pb: 21; CHECK-NEXT: popl %eax 22; CHECK: .Ltmp0: 23; CHECK-NEXT: addl $_GLOBAL_OFFSET_TABLE_+(.Ltmp0-.L0$pb), %eax 24; CHECK-NEXT: movl fptr@GOT(%eax), %eax 25; CHECK-NEXT: movl (%eax), %ebx 26; CHECK-NEXT: movl $1, %eax 27; CHECK-NEXT: movl $2, %ecx 28; CHECK-NEXT: movl $3, %edx 29; CHECK-NEXT: movl $4, %edi 30; CHECK-NEXT: movl $5, %esi 31; CHECK-NEXT: calll *%ebx 32 33entry: 34 %0 = load i32 (i32, i32, i32, i32, i32)*, i32 (i32, i32, i32, i32, i32)** @fptr, align 4 35 %call = call x86_regcallcc i32 %0(i32 inreg 1, i32 inreg 2, i32 inreg 3, i32 inreg 4, i32 inreg 5) 36 ret i32 %call 37} 38