From ca8c1cd643b12cd652bb73804e1645b75292357a Mon Sep 17 00:00:00 2001 From: Michael Matz Date: Mon, 8 Aug 2016 20:18:11 +0200 Subject: x86-64: Allow loads from some structs/unions GCC allows register loads for asms based on type mode, and correctly sized structs/union have an allowed mode (basically 1,2,4,8 sized aggregates). --- tests/tcctest.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'tests/tcctest.c') diff --git a/tests/tcctest.c b/tests/tcctest.c index 30d78b8..f8a9ca6 100644 --- a/tests/tcctest.c +++ b/tests/tcctest.c @@ -2677,6 +2677,7 @@ void asm_test(void) asm block gets the outer one. */ int base_func = 42; void override_func3 (void); + unsigned long asmret; printf("inline asm:\n"); @@ -2720,6 +2721,11 @@ void asm_test(void) the global one, not the local decl from this function. */ asm volatile(".weak override_func3\n.set override_func3, base_func"); override_func3(); + /* Check that we can also load structs of appropriate layout + into registers. */ + asm volatile("" : "=r" (asmret) : "0"(s2)); + if (asmret != s2.addr) + printf("asmstr: failed\n"); return; label1: goto label2; -- cgit v1.3.1