394f30919a
This patch adds support for constraints `f`, `l`, `I`, `K` according to [1]. The remain constraints (`k`, `m`, `ZB`, `ZC`) will be added later as they are a little more complex than the others. f: A floating-point register (if available). l: A signed 16-bit constant. I: A signed 12-bit constant (for arithmetic instructions). K: An unsigned 12-bit constant (for logic instructions). For now, no need to support register alias (e.g. `$a0`) in llvm as clang will correctly decode the usage of register name aliases into their official names. And AFAIK, the not yet upstreamed `rustc` for LoongArch will always use official register names (e.g. `$r4`). [1] https://gcc.gnu.org/onlinedocs/gccint/Machine-Constraints.html Differential Revision: https://reviews.llvm.org/D134157
24 lines
929 B
C
24 lines
929 B
C
// RUN: not %clang_cc1 -triple loongarch32 -O2 -emit-llvm %s 2>&1 -o - | FileCheck %s
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// RUN: not %clang_cc1 -triple loongarch64 -O2 -emit-llvm %s 2>&1 -o - | FileCheck %s
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void test_l(void) {
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// CHECK: :[[#@LINE+1]]:27: error: value '32768' out of range for constraint 'l'
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asm volatile ("" :: "l"(32768));
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// CHECK: :[[#@LINE+1]]:27: error: value '-32769' out of range for constraint 'l'
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asm volatile ("" :: "l"(-32769));
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}
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void test_I(void) {
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// CHECK: :[[#@LINE+1]]:27: error: value '2048' out of range for constraint 'I'
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asm volatile ("" :: "I"(2048));
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// CHECK: :[[#@LINE+1]]:27: error: value '-2049' out of range for constraint 'I'
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asm volatile ("" :: "I"(-2049));
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}
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void test_K(void) {
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// CHECK: :[[#@LINE+1]]:27: error: value '4096' out of range for constraint 'K'
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asm volatile ("" :: "K"(4096));
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// CHECK: :[[#@LINE+1]]:27: error: value '-1' out of range for constraint 'K'
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asm volatile ("" :: "K"(-1));
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}
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