diff options
| -rw-r--r-- | llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp | 10 | ||||
| -rw-r--r-- | llvm/test/CodeGen/PowerPC/asm-constraints.ll | 32 |
2 files changed, 42 insertions, 0 deletions
diff --git a/llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp b/llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp index 26ba8aa45e4..c038db7420b 100644 --- a/llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp +++ b/llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp @@ -275,6 +275,16 @@ bool PPCAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo, printOperand(MI, OpNo, O); return false; } + case 'U': // Print 'u' for update form. + case 'X': // Print 'x' for indexed form. + { + // Memory constraints should always produce an MO_Register, + // so we never get an update or indexed form. (In GCC, these + // are useful in internal code gen; not so much in inline asm.) + // So tolerate these but don't output anything. + assert(MI->getOperand(OpNo).isReg()); + return false; + } } } diff --git a/llvm/test/CodeGen/PowerPC/asm-constraints.ll b/llvm/test/CodeGen/PowerPC/asm-constraints.ll new file mode 100644 index 00000000000..1292a8197af --- /dev/null +++ b/llvm/test/CodeGen/PowerPC/asm-constraints.ll @@ -0,0 +1,32 @@ +; RUN llc < %s -mcpu=pwr8 | FileCheck %s + +target datalayout = "e-m:e-i64:64-n32:64" +target triple = "powerpc64le-unknown-linux-gnu" + +; Function Attrs: nounwind +; Check that we accept 'U' and 'X' constraints. +define void @foo(i32 signext %result, i8* %addr) #0 { +entry: + %result.addr = alloca i32, align 4 + %addr.addr = alloca i8*, align 8 + store i32 %result, i32* %result.addr, align 4 + store i8* %addr, i8** %addr.addr, align 8 + %0 = load i8** %addr.addr, align 8 + %1 = call i32 asm sideeffect "ld${1:U}${1:X} $0,$1\0Acmpw $0,$0\0Abne- 1f\0A1: isync\0A", "=r,*m,~{memory},~{cr0}"(i8* %0) #1, !srcloc !1 + store i32 %1, i32* %result.addr, align 4 + ret void +} + +; CHECK-LABEL: @foo +; CHECK: ld [[REG:[0-9]+]],0(4) +; CHECK-NEXT: cmpw [[REG]],[[REG]] +; CHECK-NEXT: bne- 1f +; CHECK-NEXT: 1: isync + +attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } +attributes #1 = { nounwind } + +!llvm.ident = !{!0} + +!0 = metadata !{metadata !"clang version 3.6.0 (trunk 217557)"} +!1 = metadata !{i32 67, i32 91, i32 110, i32 126} |
