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17 lines
524 B
C
17 lines
524 B
C
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// RUN: %llvmgcc %s -c -O3 -m64 -emit-llvm -o - | llc -march=x86-64 -mtriple=x86_64-apple-darwin | FileCheck %s
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// r9 used to be clobbered before its value was moved to r10. 7993104.
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void foo(int x, int y) {
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// CHECK: bar
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// CHECK: movq %r9, %r10
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// CHECK: movq %rdi, %r9
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// CHECK: bar
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register int lr9 asm("r9") = x;
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register int lr10 asm("r10") = y;
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int foo;
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asm volatile("bar" : "=r"(lr9) : "r"(lr9), "r"(lr10));
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foo = lr9;
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lr9 = x;
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lr10 = foo;
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asm volatile("bar" : "=r"(lr9) : "r"(lr9), "r"(lr10));
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}
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