MIPS: Fix missing falthru handling for some branch cases in TF.

TEST=mjsunit/asm/embenchen/zlib
BUG=

Review URL: https://codereview.chromium.org/1232313007

Cr-Commit-Position: refs/heads/master@{#29735}

src/compiler/mips/code-generator-mips.cc

@@ -907,42 +907,32 @@ void CodeGenerator::AssembleArchBranch(Instruction* instr, BranchInfo* branch) {
     cc = FlagsConditionToConditionTst(branch->condition);
     __ And(at, i.InputRegister(0), i.InputOperand(1));
     __ Branch(tlabel, cc, at, Operand(zero_reg));
-
   } else if (instr->arch_opcode() == kMipsAddOvf ||
              instr->arch_opcode() == kMipsSubOvf) {
     // kMipsAddOvf, SubOvf emit negative result to 'kCompareReg' on overflow.
     cc = FlagsConditionToConditionOvf(branch->condition);
     __ Branch(tlabel, cc, kCompareReg, Operand(zero_reg));
-
   } else if (instr->arch_opcode() == kMipsCmp) {
     cc = FlagsConditionToConditionCmp(branch->condition);
     __ Branch(tlabel, cc, i.InputRegister(0), i.InputOperand(1));
-
-    if (!branch->fallthru) __ Branch(flabel);  // no fallthru to flabel.
-
   } else if (instr->arch_opcode() == kMipsCmpS) {
     if (!convertCondition(branch->condition, cc)) {
       UNSUPPORTED_COND(kMips64CmpS, branch->condition);
     }
     __ BranchF32(tlabel, NULL, cc, i.InputSingleRegister(0),
                  i.InputSingleRegister(1));
-
-    if (!branch->fallthru) __ Branch(flabel);  // no fallthru to flabel.
-
   } else if (instr->arch_opcode() == kMipsCmpD) {
     if (!convertCondition(branch->condition, cc)) {
       UNSUPPORTED_COND(kMips64CmpD, branch->condition);
     }
     __ BranchF64(tlabel, NULL, cc, i.InputDoubleRegister(0),
                  i.InputDoubleRegister(1));
-
-    if (!branch->fallthru) __ Branch(flabel);  // no fallthru to flabel.
-
   } else {
     PrintF("AssembleArchBranch Unimplemented arch_opcode: %d\n",
            instr->arch_opcode());
     UNIMPLEMENTED();
   }
+  if (!branch->fallthru) __ Branch(flabel);  // no fallthru to flabel.
 }
 
 

src/compiler/mips64/code-generator-mips64.cc

@@ -983,37 +983,30 @@ void CodeGenerator::AssembleArchBranch(Instruction* instr, BranchInfo* branch) {
   } else if (instr->arch_opcode() == kMips64Dadd ||
              instr->arch_opcode() == kMips64Dsub) {
     cc = FlagsConditionToConditionOvf(branch->condition);
-
     __ dsra32(kScratchReg, i.OutputRegister(), 0);
     __ sra(at, i.OutputRegister(), 31);
     __ Branch(tlabel, cc, at, Operand(kScratchReg));
   } else if (instr->arch_opcode() == kMips64Cmp) {
     cc = FlagsConditionToConditionCmp(branch->condition);
     __ Branch(tlabel, cc, i.InputRegister(0), i.InputOperand(1));
-
-    if (!branch->fallthru) __ Branch(flabel);  // no fallthru to flabel.
   } else if (instr->arch_opcode() == kMips64CmpS) {
     if (!convertCondition(branch->condition, cc)) {
       UNSUPPORTED_COND(kMips64CmpS, branch->condition);
     }
     __ BranchF32(tlabel, NULL, cc, i.InputSingleRegister(0),
                  i.InputSingleRegister(1));
-
-    if (!branch->fallthru) __ Branch(flabel);  // no fallthru to flabel.
-
   } else if (instr->arch_opcode() == kMips64CmpD) {
     if (!convertCondition(branch->condition, cc)) {
       UNSUPPORTED_COND(kMips64CmpD, branch->condition);
     }
     __ BranchF64(tlabel, NULL, cc, i.InputDoubleRegister(0),
                  i.InputDoubleRegister(1));
-
-    if (!branch->fallthru) __ Branch(flabel);  // no fallthru to flabel.
   } else {
     PrintF("AssembleArchBranch Unimplemented arch_opcode: %d\n",
            instr->arch_opcode());
     UNIMPLEMENTED();
   }
+  if (!branch->fallthru) __ Branch(flabel);  // no fallthru to flabel.
 }
 
 

test/mjsunit/mjsunit.status

@@ -493,9 +493,6 @@
 ##############################################################################
 ['arch == mipsel or arch == mips', {
 
-  # Bug in zlib due to 35eb3a0260d349cb4201fed66ff62a438962bd47
-  'asm/embenchen/zlib': [SKIP],
-
   # Slow tests which times out in debug mode.
   'try': [PASS, ['mode == debug', SKIP]],
   'debug-scripts-request': [PASS, ['mode == debug', SKIP]],
@@ -535,9 +532,6 @@
 ##############################################################################
 ['arch == mips64el', {
 
-  # Bug in zlib due to 35eb3a0260d349cb4201fed66ff62a438962bd47
-  'asm/embenchen/zlib': [SKIP],
-
   # Slow tests which times out in debug mode.
   'try': [PASS, ['mode == debug', SKIP]],
   'debug-scripts-request': [PASS, ['mode == debug', SKIP]],