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c60ac51adb
't' constraint normally only accepts f32 operands, but for VCVT the
operands can be i32. LLVM is overly restrictive and rejects asm like:
float foo() {
float result;
__asm__ __volatile__(
"vcvt.f32.s32 %[result], %[arg1]\n"
: [result]"=t"(result)
: [arg1]"t"(0x01020304) );
return result;
}
Relax the value type for 't' constraint to either f32 or i32.
Differential Revision: https://reviews.llvm.org/D40137
llvm-svn: 318472
19 lines
511 B
LLVM
19 lines
511 B
LLVM
; RUN: llc -mtriple=armv8-eabi -mattr=+neon %s -o - | FileCheck %s
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define i32 @test1(i32 %tmp54) {
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%tmp56 = tail call i32 asm "uxtb16 $0,$1", "=r,r"( i32 %tmp54 ) ; <i32> [#uses=1]
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ret i32 %tmp56
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}
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define void @test2() {
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tail call void asm sideeffect "/* number: ${0:c} */", "i"( i32 1 )
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ret void
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}
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define float @t-constraint-int(i32 %i) {
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; CHECK-LABEL: t-constraint-int
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; CHECK: vcvt.f32.s32 {{s[0-9]+}}, {{s[0-9]+}}
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%ret = call float asm "vcvt.f32.s32 $0, $1\0A", "=t,t"(i32 %i)
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ret float %ret
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}
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