xref: /llvm-project/clang/test/CodeGen/PowerPC/inline-asm-matching-constraint.c (revision f563bd74cb9a4f0d2d3eb49d35536b648361ec53) 
1*f563bd74SQiu Chaofan // RUN: %clang_cc1 -emit-llvm %s -o - -triple powerpc64le-linux-gnu | FileCheck %s
2*f563bd74SQiu Chaofan // Sadly since this requires a register constraint to trigger we have to set
3*f563bd74SQiu Chaofan // a target here.
a(void)4*f563bd74SQiu Chaofan void a(void) {
5*f563bd74SQiu Chaofan   register unsigned long __sc_0 __asm__("r0");
6*f563bd74SQiu Chaofan   __asm__ __volatile__("mfcr %0" : "=&r"(__sc_0) : "0"(__sc_0));
7*f563bd74SQiu Chaofan }
8*f563bd74SQiu Chaofan 
9*f563bd74SQiu Chaofan // Check that we can generate code for this correctly. The matching input
10*f563bd74SQiu Chaofan // constraint should not have an early clobber on it.
11*f563bd74SQiu Chaofan // CHECK: call i64 asm sideeffect "mfcr $0", "=&{r0},{r0}"
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