ARM case-insensitive checking for APSR_nzcv.

rdar://11056591

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152846 91177308-0d34-0410-b5e6-96231b3b80d8

7 files changed, 37 insertions, 10 deletions

diff --git a/lib/Target/ARM/ARMInstrVFP.td b/lib/Target/ARM/ARMInstrVFP.td
index b29b31ef35..307e25eefb 100644
--- a/lib/Target/ARM/ARMInstrVFP.td
+++ b/lib/Target/ARM/ARMInstrVFP.td
@@ -1198,7 +1198,7 @@ class MovFromVFP<bits<4> opc19_16, dag oops, dag iops, string opc, string asm,
 // to APSR.
 let Defs = [CPSR], Uses = [FPSCR_NZCV], Rt = 0b1111 /* apsr_nzcv */ in
 def FMSTAT : MovFromVFP<0b0001 /* fpscr */, (outs), (ins),
-                        "vmrs", "\tapsr_nzcv, fpscr", [(arm_fmstat)]>;
+                        "vmrs", "\tAPSR_nzcv, fpscr", [(arm_fmstat)]>;
 
 // Application level FPSCR -> GPR
 let hasSideEffects = 1, Uses = [FPSCR] in
diff --git a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
index af973e8c1f..29a9b0d844 100644
--- a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
+++ b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
@@ -3258,7 +3258,8 @@ parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
 
   if (isMClass()) {
     // See ARMv6-M 10.1.1
-    unsigned FlagsVal = StringSwitch<unsigned>(Mask)
+    std::string Name = Mask.lower();
+    unsigned FlagsVal = StringSwitch<unsigned>(Name)
       .Case("apsr", 0)
       .Case("iapsr", 1)
       .Case("eapsr", 2)
@@ -4432,10 +4433,11 @@ bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
     else if (Res == -1) // irrecoverable error
       return true;
     // If this is VMRS, check for the apsr_nzcv operand.
-    if (Mnemonic == "vmrs" && Parser.getTok().getString() == "apsr_nzcv") {
+    if (Mnemonic == "vmrs" &&
+        Parser.getTok().getString().equals_lower("apsr_nzcv")) {
       S = Parser.getTok().getLoc();
       Parser.Lex();
-      Operands.push_back(ARMOperand::CreateToken("apsr_nzcv", S));
+      Operands.push_back(ARMOperand::CreateToken("APSR_nzcv", S));
       return false;
     }
 
diff --git a/lib/Target/ARM/AsmParser/x b/lib/Target/ARM/AsmParser/x
new file mode 100644
index 0000000000..1496e70647
--- /dev/null
+++ b/lib/Target/ARM/AsmParser/x
@@ -0,0 +1,23 @@
+diff --git a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
+index af973e8..cbdae2a 100644
+--- a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
++++ b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
+@@ -3254,7 +3254,8 @@ parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
+   SMLoc S = Parser.getTok().getLoc();
+   const AsmToken &Tok = Parser.getTok();
+   assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
+-  StringRef Mask = Tok.getString();
++  std::string MaskStr = Tok.getString().lower();
++  StringRef Mask = MaskStr; // convenience for slice() and such.
+ 
+   if (isMClass()) {
+     // See ARMv6-M 10.1.1
+@@ -3290,7 +3291,7 @@ parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
+   // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
+   size_t Start = 0, Next = Mask.find('_');
+   StringRef Flags = "";
+-  std::string SpecReg = Mask.slice(Start, Next).lower();
++  StringRef SpecReg = Mask.slice(Start, Next);
+   if (Next != StringRef::npos)
+     Flags = Mask.slice(Next+1, Mask.size());
+ 
diff --git a/test/CodeGen/ARM/fpcmp-opt.ll b/test/CodeGen/ARM/fpcmp-opt.ll
index 80925c7de7..2d8f7108e0 100644
--- a/test/CodeGen/ARM/fpcmp-opt.ll
+++ b/test/CodeGen/ARM/fpcmp-opt.ll
@@ -9,7 +9,7 @@ entry:
 ; CHECK: vldr [[S0:s[0-9]+]],
 ; CHECK: vldr [[S1:s[0-9]+]],
 ; CHECK: vcmpe.f32 [[S1]], [[S0]]
-; CHECK: vmrs apsr_nzcv, fpscr
+; CHECK: vmrs APSR_nzcv, fpscr
 ; CHECK: beq
   %0 = load float* %a
   %1 = load float* %b
diff --git a/test/CodeGen/ARM/fpcmp_ueq.ll b/test/CodeGen/ARM/fpcmp_ueq.ll
index 2e6b3e3167..4a4c5b1c8b 100644
--- a/test/CodeGen/ARM/fpcmp_ueq.ll
+++ b/test/CodeGen/ARM/fpcmp_ueq.ll
@@ -5,7 +5,7 @@ define i32 @f7(float %a, float %b) {
 entry:
 ; CHECK: f7:
 ; CHECK: vcmpe.f32
-; CHECK: vmrs apsr_nzcv, fpscr
+; CHECK: vmrs APSR_nzcv, fpscr
 ; CHECK: movweq
 ; CHECK-NOT: vmrs
 ; CHECK: movwvs
diff --git a/test/CodeGen/ARM/ifcvt11.ll b/test/CodeGen/ARM/ifcvt11.ll
index 63f8557d55..0f142eef7a 100644
--- a/test/CodeGen/ARM/ifcvt11.ll
+++ b/test/CodeGen/ARM/ifcvt11.ll
@@ -18,7 +18,7 @@ bb.nph:                                           ; preds = %entry
 
 bb:                                               ; preds = %bb4, %bb.nph
 ; CHECK: vcmpe.f64
-; CHECK: vmrs apsr_nzcv, fpscr
+; CHECK: vmrs APSR_nzcv, fpscr
   %r.19 = phi i32 [ 0, %bb.nph ], [ %r.0, %bb4 ]
   %n.08 = phi i32 [ 0, %bb.nph ], [ %10, %bb4 ]
   %scevgep10 = getelementptr inbounds %struct.xyz_t* %p, i32 %n.08, i32 0
@@ -33,7 +33,7 @@ bb1:                                              ; preds = %bb
 ; CHECK-NOT: vcmpemi
 ; CHECK-NOT: vmrsmi
 ; CHECK: vcmpe.f64
-; CHECK: vmrs apsr_nzcv, fpscr
+; CHECK: vmrs APSR_nzcv, fpscr
   %scevgep12 = getelementptr %struct.xyz_t* %p, i32 %n.08, i32 2
   %6 = load double* %scevgep12, align 4
   %7 = fcmp uge double %3, %6
diff --git a/test/MC/ARM/simple-fp-encoding.s b/test/MC/ARM/simple-fp-encoding.s
index de8f3a70a9..d6a9ccca91 100644
--- a/test/MC/ARM/simple-fp-encoding.s
+++ b/test/MC/ARM/simple-fp-encoding.s
@@ -120,8 +120,10 @@
 @ CHECK: vnmls.f32 s1, s2, s0        @ encoding: [0x00,0x0a,0x51,0xee]
         vnmls.f32       s1, s2, s0
 
-@ CHECK: vmrs apsr_nzcv, fpscr       @ encoding: [0x10,0xfa,0xf1,0xee]
-@ CHECK: vmrs apsr_nzcv, fpscr       @ encoding: [0x10,0xfa,0xf1,0xee]
+@ CHECK: vmrs APSR_nzcv, fpscr       @ encoding: [0x10,0xfa,0xf1,0xee]
+@ CHECK: vmrs APSR_nzcv, fpscr       @ encoding: [0x10,0xfa,0xf1,0xee]
+@ CHECK: vmrs APSR_nzcv, fpscr       @ encoding: [0x10,0xfa,0xf1,0xee]
+        vmrs    APSR_nzcv, fpscr
         vmrs    apsr_nzcv, fpscr
         fmstat