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[mips] Support 'y' operand code to print exact log2 of the operand

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llvm-svn: 324477
This commit is contained in:
Simon Atanasyan 2018-02-07 12:36:39 +00:00
parent 6cf477a87b
commit 156abd7667
3 changed files with 29 additions and 0 deletions
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7
lib/Target/Mips/MipsAsmPrinter.cpp
View File

@ -499,6 +499,13 @@ bool MipsAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
return true;
O << MO.getImm() - 1;
return false;
case 'y': // exact log2
if ((MO.getType()) != MachineOperand::MO_Immediate)
return true;
if (!isPowerOf2_64(MO.getImm()))
return true;
O << Log2_64(MO.getImm());
return false;
case 'z':
// $0 if zero, regular printing otherwise
if (MO.getType() == MachineOperand::MO_Immediate && MO.getImm() == 0) {

11
test/CodeGen/Mips/inlineasm-opcode-bad-y.ll Normal file
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@ -0,0 +1,11 @@
; Negative test for the 'm' operand code. This operand code is applicable
; for an immediate whic is exact power of 2.
; RUN: not llc -march=mips < %s 2>&1 | FileCheck %s
define i32 @foo() nounwind {
entry:
; CHECK: error: invalid operand in inline asm: 'addiu $0, $1, ${2:y}'
tail call i32 asm sideeffect "addiu $0, $1, ${2:y}", "=r,r,I"(i32 7, i32 3) ;
ret i32 0
}

11
test/CodeGen/Mips/inlineasm-operand-code.ll
View File

@ -63,6 +63,17 @@ entry:
ret i32 0
}
; y with 4
define i32 @constraint_y_4() nounwind {
entry:
; ALL-LABEL: constraint_y_4:
; ALL: #APP
; ALL: addiu ${{[0-9]+}}, ${{[0-9]+}}, 2
; ALL: #NO_APP
tail call i32 asm sideeffect "addiu $0, $1, ${2:y}", "=r,r,I"(i32 7, i32 4) ;
ret i32 0
}
; z with -3
define void @constraint_z_0() nounwind {
entry: