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
41 lines
1.5 KiB
LLVM
41 lines
1.5 KiB
LLVM
; RUN: not llc --mtriple=loongarch32 < %s 2>&1 | FileCheck %s
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; RUN: not llc --mtriple=loongarch64 < %s 2>&1 | FileCheck %s
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define void @constraint_l() {
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; CHECK: error: value out of range for constraint 'l'
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tail call void asm sideeffect "lu12i.w $$a0, $0", "l"(i32 32768)
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; CHECK: error: value out of range for constraint 'l'
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tail call void asm sideeffect "lu12i.w $$a0, $0", "l"(i32 -32769)
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ret void
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}
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define void @constraint_I() {
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; CHECK: error: value out of range for constraint 'I'
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tail call void asm sideeffect "addi.w $$a0, $$a0, $0", "I"(i32 2048)
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; CHECK: error: value out of range for constraint 'I'
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tail call void asm sideeffect "addi.w $$a0, $$a0, $0", "I"(i32 -2049)
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ret void
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}
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define void @constraint_K() {
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; CHECK: error: value out of range for constraint 'K'
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tail call void asm sideeffect "andi.w $$a0, $$a0, $0", "K"(i32 4096)
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; CHECK: error: value out of range for constraint 'K'
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tail call void asm sideeffect "andi.w $$a0, $$a0, $0", "K"(i32 -1)
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ret void
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}
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define void @constraint_f() nounwind {
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; CHECK: error: couldn't allocate input reg for constraint 'f'
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tail call void asm "fadd.s $$fa0, $$fa0, $0", "f"(float 0.0)
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; CHECK: error: couldn't allocate input reg for constraint 'f'
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tail call void asm "fadd.s $$fa0, $$fa0, $0", "f"(double 0.0)
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ret void
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}
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define void @constraint_r_vec() nounwind {
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; CHECK: error: couldn't allocate input reg for constraint 'r'
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tail call void asm "add.w $$a0, $$a0, $0", "r"(<4 x i32> zeroinitializer)
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ret void
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}
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