xref: /llvm-project/llvm/test/CodeGen/X86/fake-use-ld.ll (revision 3d08ade7bd32f0296e0ca3a13640cc95fa89229a) 
1; RUN: llc -O0 -mtriple=x86_64-unknown-unknown < %s | FileCheck %s
2
3; Checks that fake uses of the FP stack do not cause a crash.
4;
5; /*******************************************************************/
6; extern long double foo(long double, long double, long double);
7;
8; long double actual(long double p1, long double p2, long double p3) {
9;   return fmal(p1, p2, p3);
10; }
11; /*******************************************************************/
12
13define x86_fp80 @actual(x86_fp80 %p1, x86_fp80 %p2, x86_fp80 %p3) optdebug {
14;
15; CHECK: actual
16;
17entry:
18  %p1.addr = alloca x86_fp80, align 16
19  %p2.addr = alloca x86_fp80, align 16
20  %p3.addr = alloca x86_fp80, align 16
21  store x86_fp80 %p1, ptr %p1.addr, align 16
22  store x86_fp80 %p2, ptr %p2.addr, align 16
23  store x86_fp80 %p3, ptr %p3.addr, align 16
24  %0 = load x86_fp80, ptr %p1.addr, align 16
25  %1 = load x86_fp80, ptr %p2.addr, align 16
26  %2 = load x86_fp80, ptr %p3.addr, align 16
27;
28; CHECK: callq{{.*}}foo
29;
30  %3 = call x86_fp80 @foo(x86_fp80 %0, x86_fp80 %1, x86_fp80 %2)
31  %4 = load x86_fp80, ptr %p1.addr, align 16
32  call void (...) @llvm.fake.use(x86_fp80 %4)
33  %5 = load x86_fp80, ptr %p2.addr, align 16
34  call void (...) @llvm.fake.use(x86_fp80 %5)
35  %6 = load x86_fp80, ptr %p3.addr, align 16
36  call void (...) @llvm.fake.use(x86_fp80 %6)
37;
38; CHECK: ret
39;
40  ret x86_fp80 %3
41}
42
43declare x86_fp80 @foo(x86_fp80, x86_fp80, x86_fp80)
44