Index: lib/Analysis/InstructionSimplify.cpp
===================================================================
--- lib/Analysis/InstructionSimplify.cpp
+++ lib/Analysis/InstructionSimplify.cpp
@@ -4571,28 +4571,28 @@
     }
     case Intrinsic::exp: {
       // exp(log(x)) -> x
-      if (Q.CxtI->isFast() &&
+      if (Q.CxtI->hasAllowReassoc() &&
           match(IIOperand, m_Intrinsic<Intrinsic::log>(m_Value(X))))
         return X;
       return nullptr;
     }
     case Intrinsic::exp2: {
       // exp2(log2(x)) -> x
-      if (Q.CxtI->isFast() &&
+      if (Q.CxtI->hasAllowReassoc() &&
           match(IIOperand, m_Intrinsic<Intrinsic::log2>(m_Value(X))))
         return X;
       return nullptr;
     }
     case Intrinsic::log: {
       // log(exp(x)) -> x
-      if (Q.CxtI->isFast() &&
+      if (Q.CxtI->hasAllowReassoc() &&
           match(IIOperand, m_Intrinsic<Intrinsic::exp>(m_Value(X))))
         return X;
       return nullptr;
     }
     case Intrinsic::log2: {
       // log2(exp2(x)) -> x
-      if (Q.CxtI->isFast() &&
+      if (Q.CxtI->hasAllowReassoc() &&
           match(IIOperand, m_Intrinsic<Intrinsic::exp2>(m_Value(X)))) {
         return X;
       }
Index: test/Transforms/InstSimplify/exp-intrinsic.ll
===================================================================
--- test/Transforms/InstSimplify/exp-intrinsic.ll
+++ test/Transforms/InstSimplify/exp-intrinsic.ll
@@ -15,31 +15,31 @@
   ret double %2
 }
 
-define double @exp_log_fast(double %a) {
-; CHECK-LABEL: @exp_log_fast(
+define double @exp_log_reassoc(double %a) {
+; CHECK-LABEL: @exp_log_reassoc(
 ; CHECK-NEXT:    ret double [[A:%.*]]
 ;
   %1 = call fast double @llvm.log.f64(double %a)
-  %2 = call fast double @llvm.exp.f64(double %1)
+  %2 = call reassoc double @llvm.exp.f64(double %1)
   ret double %2
 }
 
-define double @exp_fast_log_strict(double %a) {
-; CHECK-LABEL: @exp_fast_log_strict(
+define double @exp_reassoc_log_strict(double %a) {
+; CHECK-LABEL: @exp_reassoc_log_strict(
 ; CHECK-NEXT:    ret double [[A:%.*]]
 ;
   %1 = call double @llvm.log.f64(double %a)
-  %2 = call fast double @llvm.exp.f64(double %1)
+  %2 = call reassoc double @llvm.exp.f64(double %1)
   ret double %2
 }
 
-define double @exp_strict_log_fast(double %a) {
-; CHECK-LABEL: @exp_strict_log_fast(
-; CHECK-NEXT:    [[TMP1:%.*]] = call fast double @llvm.log.f64(double [[A:%.*]])
+define double @exp_strict_log_reassoc(double %a) {
+; CHECK-LABEL: @exp_strict_log_reassoc(
+; CHECK-NEXT:    [[TMP1:%.*]] = call reassoc double @llvm.log.f64(double [[A:%.*]])
 ; CHECK-NEXT:    [[TMP2:%.*]] = call double @llvm.exp.f64(double [[TMP1]])
 ; CHECK-NEXT:    ret double [[TMP2]]
 ;
-  %1 = call fast double @llvm.log.f64(double %a)
+  %1 = call reassoc double @llvm.log.f64(double %a)
   %2 = call double @llvm.exp.f64(double %1)
   ret double %2
 }
@@ -59,13 +59,13 @@
   ret double %4
 }
 
-define double @exp_log_exp_log_fast(double %a) {
-; CHECK-LABEL: @exp_log_exp_log_fast(
+define double @exp_log_exp_log_reassoc(double %a) {
+; CHECK-LABEL: @exp_log_exp_log_reassoc(
 ; CHECK-NEXT:    ret double [[A:%.*]]
 ;
-  %1 = call fast double @llvm.log.f64(double %a)
-  %2 = call fast double @llvm.exp.f64(double %1)
-  %3 = call fast double @llvm.log.f64(double %2)
-  %4 = call fast double @llvm.exp.f64(double %3)
+  %1 = call double @llvm.log.f64(double %a)
+  %2 = call reassoc double @llvm.exp.f64(double %1)
+  %3 = call double @llvm.log.f64(double %2)
+  %4 = call reassoc double @llvm.exp.f64(double %3)
   ret double %4
 }
Index: test/Transforms/InstSimplify/exp2-intrinsic.ll
===================================================================
--- test/Transforms/InstSimplify/exp2-intrinsic.ll
+++ test/Transforms/InstSimplify/exp2-intrinsic.ll
@@ -15,31 +15,31 @@
   ret double %2
 }
 
-define double @exp2_log2_fast(double %a) {
-; CHECK-LABEL: @exp2_log2_fast(
+define double @exp2_log2_reassoc(double %a) {
+; CHECK-LABEL: @exp2_log2_reassoc(
 ; CHECK-NEXT:    ret double [[A:%.*]]
 ;
   %1 = call fast double @llvm.log2.f64(double %a)
-  %2 = call fast double @llvm.exp2.f64(double %1)
+  %2 = call reassoc double @llvm.exp2.f64(double %1)
   ret double %2
 }
 
-define double @exp2_fast_log2_strict(double %a) {
-; CHECK-LABEL: @exp2_fast_log2_strict(
+define double @exp2_reassoc_log2_strict(double %a) {
+; CHECK-LABEL: @exp2_reassoc_log2_strict(
 ; CHECK-NEXT:    ret double [[A:%.*]]
 ;
   %1 = call double @llvm.log2.f64(double %a)
-  %2 = call fast double @llvm.exp2.f64(double %1)
+  %2 = call reassoc double @llvm.exp2.f64(double %1)
   ret double %2
 }
 
-define double @exp2_strict_log2_fast(double %a) {
-; CHECK-LABEL: @exp2_strict_log2_fast(
-; CHECK-NEXT:    [[TMP1:%.*]] = call fast double @llvm.log2.f64(double [[A:%.*]])
+define double @exp2_strict_log2_reassoc(double %a) {
+; CHECK-LABEL: @exp2_strict_log2_reassoc(
+; CHECK-NEXT:    [[TMP1:%.*]] = call reassoc double @llvm.log2.f64(double [[A:%.*]])
 ; CHECK-NEXT:    [[TMP2:%.*]] = call double @llvm.exp2.f64(double [[TMP1]])
 ; CHECK-NEXT:    ret double [[TMP2]]
 ;
-  %1 = call fast double @llvm.log2.f64(double %a)
+  %1 = call reassoc double @llvm.log2.f64(double %a)
   %2 = call double @llvm.exp2.f64(double %1)
   ret double %2
 }
@@ -59,13 +59,13 @@
   ret double %4
 }
 
-define double @exp2_log2_exp2_log2_fast(double %a) {
-; CHECK-LABEL: @exp2_log2_exp2_log2_fast(
+define double @exp2_log2_exp2_log2_reassoc(double %a) {
+; CHECK-LABEL: @exp2_log2_exp2_log2_reassoc(
 ; CHECK-NEXT:    ret double [[A:%.*]]
 ;
-  %1 = call fast double @llvm.log2.f64(double %a)
-  %2 = call fast double @llvm.exp2.f64(double %1)
-  %3 = call fast double @llvm.log2.f64(double %2)
-  %4 = call fast double @llvm.exp2.f64(double %3)
+  %1 = call double @llvm.log2.f64(double %a)
+  %2 = call reassoc double @llvm.exp2.f64(double %1)
+  %3 = call double @llvm.log2.f64(double %2)
+  %4 = call reassoc double @llvm.exp2.f64(double %3)
   ret double %4
 }
Index: test/Transforms/InstSimplify/log-intrinsic.ll
===================================================================
--- test/Transforms/InstSimplify/log-intrinsic.ll
+++ test/Transforms/InstSimplify/log-intrinsic.ll
@@ -15,31 +15,31 @@
   ret double %2
 }
 
-define double @log_exp_fast(double %a) {
-; CHECK-LABEL: @log_exp_fast(
+define double @log_exp_reassoc(double %a) {
+; CHECK-LABEL: @log_exp_reassoc(
 ; CHECK-NEXT:    ret double [[A:%.*]]
 ;
   %1 = call fast double @llvm.exp.f64(double %a)
-  %2 = call fast double @llvm.log.f64(double %1)
+  %2 = call reassoc double @llvm.log.f64(double %1)
   ret double %2
 }
 
-define double @log_fast_exp_strict(double %a) {
-; CHECK-LABEL: @log_fast_exp_strict(
+define double @log_reassoc_exp_strict(double %a) {
+; CHECK-LABEL: @log_reassoc_exp_strict(
 ; CHECK-NEXT:    ret double [[A:%.*]]
 ;
   %1 = call double @llvm.exp.f64(double %a)
-  %2 = call fast double @llvm.log.f64(double %1)
+  %2 = call reassoc double @llvm.log.f64(double %1)
   ret double %2
 }
 
-define double @log_strict_exp_fast(double %a) {
-; CHECK-LABEL: @log_strict_exp_fast(
-; CHECK-NEXT:    [[TMP1:%.*]] = call fast double @llvm.exp.f64(double [[A:%.*]])
+define double @log_strict_exp_reassoc(double %a) {
+; CHECK-LABEL: @log_strict_exp_reassoc(
+; CHECK-NEXT:    [[TMP1:%.*]] = call reassoc double @llvm.exp.f64(double [[A:%.*]])
 ; CHECK-NEXT:    [[TMP2:%.*]] = call double @llvm.log.f64(double [[TMP1]])
 ; CHECK-NEXT:    ret double [[TMP2]]
 ;
-  %1 = call fast double @llvm.exp.f64(double %a)
+  %1 = call reassoc double @llvm.exp.f64(double %a)
   %2 = call double @llvm.log.f64(double %1)
   ret double %2
 }
@@ -59,13 +59,13 @@
   ret double %4
 }
 
-define double @log_exp_log_exp_fast(double %a) {
-; CHECK-LABEL: @log_exp_log_exp_fast(
+define double @log_exp_log_exp_reassoc(double %a) {
+; CHECK-LABEL: @log_exp_log_exp_reassoc(
 ; CHECK-NEXT:    ret double [[A:%.*]]
 ;
-  %1 = call fast double @llvm.exp.f64(double %a)
-  %2 = call fast double @llvm.log.f64(double %1)
-  %3 = call fast double @llvm.exp.f64(double %2)
-  %4 = call fast double @llvm.log.f64(double %3)
+  %1 = call double @llvm.exp.f64(double %a)
+  %2 = call reassoc double @llvm.log.f64(double %1)
+  %3 = call double @llvm.exp.f64(double %2)
+  %4 = call reassoc double @llvm.log.f64(double %3)
   ret double %4
 }
Index: test/Transforms/InstSimplify/log2-intrinsic.ll
===================================================================
--- test/Transforms/InstSimplify/log2-intrinsic.ll
+++ test/Transforms/InstSimplify/log2-intrinsic.ll
@@ -15,31 +15,31 @@
   ret double %2
 }
 
-define double @log2_exp2_fast(double %a) {
-; CHECK-LABEL: @log2_exp2_fast(
+define double @log2_exp2_reassoc(double %a) {
+; CHECK-LABEL: @log2_exp2_reassoc(
 ; CHECK-NEXT:    ret double [[A:%.*]]
 ;
   %1 = call fast double @llvm.exp2.f64(double %a)
-  %2 = call fast double @llvm.log2.f64(double %1)
+  %2 = call reassoc double @llvm.log2.f64(double %1)
   ret double %2
 }
 
-define double @log2_fast_exp2_strict(double %a) {
-; CHECK-LABEL: @log2_fast_exp2_strict(
+define double @log2_reassoc_exp2_strict(double %a) {
+; CHECK-LABEL: @log2_reassoc_exp2_strict(
 ; CHECK-NEXT:    ret double [[A:%.*]]
 ;
   %1 = call double @llvm.exp2.f64(double %a)
-  %2 = call fast double @llvm.log2.f64(double %1)
+  %2 = call reassoc double @llvm.log2.f64(double %1)
   ret double %2
 }
 
-define double @log2_strict_exp2_fast(double %a) {
-; CHECK-LABEL: @log2_strict_exp2_fast(
-; CHECK-NEXT:    [[TMP1:%.*]] = call fast double @llvm.exp2.f64(double [[A:%.*]])
+define double @log2_strict_exp2_reassoc(double %a) {
+; CHECK-LABEL: @log2_strict_exp2_reassoc(
+; CHECK-NEXT:    [[TMP1:%.*]] = call reassoc double @llvm.exp2.f64(double [[A:%.*]])
 ; CHECK-NEXT:    [[TMP2:%.*]] = call double @llvm.log2.f64(double [[TMP1]])
 ; CHECK-NEXT:    ret double [[TMP2]]
 ;
-  %1 = call fast double @llvm.exp2.f64(double %a)
+  %1 = call reassoc double @llvm.exp2.f64(double %a)
   %2 = call double @llvm.log2.f64(double %1)
   ret double %2
 }
@@ -59,13 +59,13 @@
   ret double %4
 }
 
-define double @log2_exp2_log2_exp2_fast(double %a) {
-; CHECK-LABEL: @log2_exp2_log2_exp2_fast(
+define double @log2_exp2_log2_exp2_reassoc(double %a) {
+; CHECK-LABEL: @log2_exp2_log2_exp2_reassoc(
 ; CHECK-NEXT:    ret double [[A:%.*]]
 ;
-  %1 = call fast double @llvm.exp2.f64(double %a)
-  %2 = call fast double @llvm.log2.f64(double %1)
-  %3 = call fast double @llvm.exp2.f64(double %2)
-  %4 = call fast double @llvm.log2.f64(double %3)
+  %1 = call double @llvm.exp2.f64(double %a)
+  %2 = call reassoc double @llvm.log2.f64(double %1)
+  %3 = call double @llvm.exp2.f64(double %2)
+  %4 = call reassoc double @llvm.log2.f64(double %3)
   ret double %4
 }