diff --git a/MicroBenchmarks/ImageProcessing/BilateralFiltering/CMakeLists.txt b/MicroBenchmarks/ImageProcessing/BilateralFiltering/CMakeLists.txt
--- a/MicroBenchmarks/ImageProcessing/BilateralFiltering/CMakeLists.txt
+++ b/MicroBenchmarks/ImageProcessing/BilateralFiltering/CMakeLists.txt
@@ -3,8 +3,8 @@
 list(APPEND LDFLAGS -lm)
 
 # Floating point contraction must be suppressed due to accuracy issues
-list(APPEND CXXFLAGS -ffp-contract=off -DFMA_DISABLED=1)
-list(APPEND CFLAGS -ffp-contract=off -DFMA_DISABLED=1)
+list(APPEND CXXFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
+list(APPEND CFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
 
 llvm_test_verify_hash_program_output(bilateralFilterOutput.txt)
 llvm_test_verify(WORKDIR ${CMAKE_CURRENT_BINARY_DIR}
diff --git a/MicroBenchmarks/ImageProcessing/Blur/CMakeLists.txt b/MicroBenchmarks/ImageProcessing/Blur/CMakeLists.txt
--- a/MicroBenchmarks/ImageProcessing/Blur/CMakeLists.txt
+++ b/MicroBenchmarks/ImageProcessing/Blur/CMakeLists.txt
@@ -4,8 +4,8 @@
 list(APPEND LDFLAGS -lm)
 
 # Floating point contraction must be suppressed due to accuracy issues
-list(APPEND CXXFLAGS -ffp-contract=off -DFMA_DISABLED=1)
-list(APPEND CFLAGS -ffp-contract=off -DFMA_DISABLED=1)
+list(APPEND CXXFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
+list(APPEND CFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
 
 llvm_test_verify_hash_program_output(boxBlurOutput.txt)
 llvm_test_verify(WORKDIR ${CMAKE_CURRENT_BINARY_DIR}
diff --git a/MultiSource/Applications/oggenc/CMakeLists.txt b/MultiSource/Applications/oggenc/CMakeLists.txt
--- a/MultiSource/Applications/oggenc/CMakeLists.txt
+++ b/MultiSource/Applications/oggenc/CMakeLists.txt
@@ -1,7 +1,7 @@
 list(APPEND CFLAGS -fno-strict-aliasing)
 # Floating point contraction must be suppressed due to accuracy issues
-list(APPEND CXXFLAGS -ffp-contract=off -DFMA_DISABLED=1)
-list(APPEND CFLAGS -ffp-contract=off -DFMA_DISABLED=1)
+list(APPEND CXXFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
+list(APPEND CFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
 
 list(APPEND LDFLAGS -lm)
 set(RUN_OPTIONS -Q -s 901820 - < tune)
diff --git a/MultiSource/Benchmarks/DOE-ProxyApps-C++/CLAMR/CMakeLists.txt b/MultiSource/Benchmarks/DOE-ProxyApps-C++/CLAMR/CMakeLists.txt
--- a/MultiSource/Benchmarks/DOE-ProxyApps-C++/CLAMR/CMakeLists.txt
+++ b/MultiSource/Benchmarks/DOE-ProxyApps-C++/CLAMR/CMakeLists.txt
@@ -1,6 +1,6 @@
 set(RUN_OPTIONS -n 64 -t 1000)
 # Floating point contraction must be suppressed due to accuracy issues
-list(APPEND CXXFLAGS -ffp-contract=off -DFMA_DISABLED=1)
-list(APPEND CFLAGS -ffp-contract=off -DFMA_DISABLED=1)
+list(APPEND CXXFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
+list(APPEND CFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
 
 llvm_multisource(CLAMR)
diff --git a/MultiSource/Benchmarks/DOE-ProxyApps-C++/HPCCG/CMakeLists.txt b/MultiSource/Benchmarks/DOE-ProxyApps-C++/HPCCG/CMakeLists.txt
--- a/MultiSource/Benchmarks/DOE-ProxyApps-C++/HPCCG/CMakeLists.txt
+++ b/MultiSource/Benchmarks/DOE-ProxyApps-C++/HPCCG/CMakeLists.txt
@@ -1,7 +1,7 @@
 list(APPEND CXXFLAGS -DREDSTORM) # -DREDSTORM for mkdir
 # Floating point contraction must be suppressed due to accuracy issues
-list(APPEND CXXFLAGS -ffp-contract=off -DFMA_DISABLED=1)
-list(APPEND CFLAGS -ffp-contract=off -DFMA_DISABLED=1)
+list(APPEND CXXFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
+list(APPEND CFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
 
 list(APPEND LDFLAGS -lm)
 set(RUN_OPTIONS 50 50 50)
diff --git a/MultiSource/Benchmarks/DOE-ProxyApps-C++/miniFE/CMakeLists.txt b/MultiSource/Benchmarks/DOE-ProxyApps-C++/miniFE/CMakeLists.txt
--- a/MultiSource/Benchmarks/DOE-ProxyApps-C++/miniFE/CMakeLists.txt
+++ b/MultiSource/Benchmarks/DOE-ProxyApps-C++/miniFE/CMakeLists.txt
@@ -7,8 +7,8 @@
   list(APPEND CXXFLAGS -D_XOPEN_SOURCE=700 -DUseTimes)
 endif()
 # Floating point contraction must be suppressed due to accuracy issues
-list(APPEND CXXFLAGS -ffp-contract=off -DFMA_DISABLED=1)
-list(APPEND CFLAGS -ffp-contract=off -DFMA_DISABLED=1)
+list(APPEND CXXFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
+list(APPEND CFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
 
 list(APPEND LDFLAGS -lm)
 set(RUN_OPTIONS -nx 64 -ny 64 -nz 64)
diff --git a/MultiSource/Benchmarks/Rodinia/srad/CMakeLists.txt b/MultiSource/Benchmarks/Rodinia/srad/CMakeLists.txt
--- a/MultiSource/Benchmarks/Rodinia/srad/CMakeLists.txt
+++ b/MultiSource/Benchmarks/Rodinia/srad/CMakeLists.txt
@@ -2,8 +2,8 @@
 set(FP_ABSTOLERANCE 0.00001)
 list(APPEND CFLAGS -I${CMAKE_CURRENT_SOURCE_DIR}/../Common)
 # Floating point contraction must be suppressed due to accuracy issues
-list(APPEND CXXFLAGS -ffp-contract=off -DFMA_DISABLED=1)
-list(APPEND CFLAGS -ffp-contract=off -DFMA_DISABLED=1)
+list(APPEND CXXFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
+list(APPEND CFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
 
 llvm_multisource(srad
   main.c
diff --git a/SingleSource/Benchmarks/Linpack/CMakeLists.txt b/SingleSource/Benchmarks/Linpack/CMakeLists.txt
--- a/SingleSource/Benchmarks/Linpack/CMakeLists.txt
+++ b/SingleSource/Benchmarks/Linpack/CMakeLists.txt
@@ -1,7 +1,7 @@
 list(APPEND LDFLAGS -lm)
 set(FP_TOLERANCE 0.0001)
 # Floating point contraction must be suppressed due to accuracy issues
-list(APPEND CXXFLAGS -ffp-contract=off -DFMA_DISABLED=1)
-list(APPEND CFLAGS -ffp-contract=off -DFMA_DISABLED=1)
+list(APPEND CXXFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
+list(APPEND CFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
 
 llvm_singlesource()
diff --git a/SingleSource/Benchmarks/Misc-C++/Large/CMakeLists.txt b/SingleSource/Benchmarks/Misc-C++/Large/CMakeLists.txt
--- a/SingleSource/Benchmarks/Misc-C++/Large/CMakeLists.txt
+++ b/SingleSource/Benchmarks/Misc-C++/Large/CMakeLists.txt
@@ -2,7 +2,7 @@
 set(FP_ABSTOLERANCE 0.01)
 set(HASH_PROGRAM_OUTPUT 1)
 # Floating point contraction must be suppressed due to accuracy issues
-list(APPEND CXXFLAGS -ffp-contract=off -DFMA_DISABLED=1)
-list(APPEND CFLAGS -ffp-contract=off -DFMA_DISABLED=1)
+list(APPEND CXXFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
+list(APPEND CFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
 
 llvm_singlesource()
diff --git a/SingleSource/Benchmarks/Polybench/datamining/correlation/CMakeLists.txt b/SingleSource/Benchmarks/Polybench/datamining/correlation/CMakeLists.txt
--- a/SingleSource/Benchmarks/Polybench/datamining/correlation/CMakeLists.txt
+++ b/SingleSource/Benchmarks/Polybench/datamining/correlation/CMakeLists.txt
@@ -4,8 +4,8 @@
   list(APPEND CFLAGS -DSMALL_DATASET)
 endif()
 # Floating point contraction must be suppressed due to accuracy issues
-list(APPEND CXXFLAGS -ffp-contract=off -DFMA_DISABLED=1)
-list(APPEND CFLAGS -ffp-contract=off -DFMA_DISABLED=1)
+list(APPEND CXXFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
+list(APPEND CFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
 
 set(HASH_PROGRAM_OUTPUT 1)
 add_definitions(-DFP_ABSTOLERANCE=1e-5)
diff --git a/SingleSource/Benchmarks/Polybench/datamining/covariance/CMakeLists.txt b/SingleSource/Benchmarks/Polybench/datamining/covariance/CMakeLists.txt
--- a/SingleSource/Benchmarks/Polybench/datamining/covariance/CMakeLists.txt
+++ b/SingleSource/Benchmarks/Polybench/datamining/covariance/CMakeLists.txt
@@ -4,8 +4,8 @@
   list(APPEND CFLAGS -DSMALL_DATASET)
 endif()
 # Floating point contraction must be suppressed due to accuracy issues
-list(APPEND CXXFLAGS -ffp-contract=off -DFMA_DISABLED=1)
-list(APPEND CFLAGS -ffp-contract=off -DFMA_DISABLED=1)
+list(APPEND CXXFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
+list(APPEND CFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
 
 set(HASH_PROGRAM_OUTPUT 1)
 add_definitions(-DFP_ABSTOLERANCE=1e-5)
diff --git a/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/2mm/CMakeLists.txt b/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/2mm/CMakeLists.txt
--- a/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/2mm/CMakeLists.txt
+++ b/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/2mm/CMakeLists.txt
@@ -6,6 +6,6 @@
 set(HASH_PROGRAM_OUTPUT 1)
 add_definitions(-DFP_ABSTOLERANCE=1e-5)
 # Floating point contraction must be suppressed due to accuracy issues
-list(APPEND CXXFLAGS -ffp-contract=off -DFMA_DISABLED=1)
-list(APPEND CFLAGS -ffp-contract=off -DFMA_DISABLED=1)
+list(APPEND CXXFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
+list(APPEND CFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
 llvm_singlesource()
diff --git a/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/3mm/CMakeLists.txt b/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/3mm/CMakeLists.txt
--- a/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/3mm/CMakeLists.txt
+++ b/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/3mm/CMakeLists.txt
@@ -6,6 +6,6 @@
 set(HASH_PROGRAM_OUTPUT 1)
 add_definitions(-DFP_ABSTOLERANCE=1e-5)
 # Floating point contraction must be suppressed due to accuracy issues
-list(APPEND CXXFLAGS -ffp-contract=off -DFMA_DISABLED=1)
-list(APPEND CFLAGS -ffp-contract=off -DFMA_DISABLED=1)
+list(APPEND CXXFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
+list(APPEND CFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
 llvm_singlesource()
diff --git a/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/atax/CMakeLists.txt b/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/atax/CMakeLists.txt
--- a/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/atax/CMakeLists.txt
+++ b/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/atax/CMakeLists.txt
@@ -3,7 +3,7 @@
 set(HASH_PROGRAM_OUTPUT 1)
 add_definitions(-DFP_ABSTOLERANCE=1e-5)
 # Floating point contraction must be suppressed due to accuracy issues
-list(APPEND CXXFLAGS -ffp-contract=off -DFMA_DISABLED=1)
-list(APPEND CFLAGS -ffp-contract=off -DFMA_DISABLED=1)
+list(APPEND CXXFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
+list(APPEND CFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
 
 llvm_singlesource()
diff --git a/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/bicg/CMakeLists.txt b/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/bicg/CMakeLists.txt
--- a/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/bicg/CMakeLists.txt
+++ b/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/bicg/CMakeLists.txt
@@ -3,7 +3,7 @@
 set(HASH_PROGRAM_OUTPUT 1)
 add_definitions(-DFP_ABSTOLERANCE=1e-5)
 # Floating point contraction must be suppressed due to accuracy issues
-list(APPEND CXXFLAGS -ffp-contract=off -DFMA_DISABLED=1)
-list(APPEND CFLAGS -ffp-contract=off -DFMA_DISABLED=1)
+list(APPEND CXXFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
+list(APPEND CFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
 
 llvm_singlesource()
diff --git a/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/gemver/CMakeLists.txt b/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/gemver/CMakeLists.txt
--- a/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/gemver/CMakeLists.txt
+++ b/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/gemver/CMakeLists.txt
@@ -3,7 +3,7 @@
 set(HASH_PROGRAM_OUTPUT 1)
 add_definitions(-DFP_ABSTOLERANCE=1e-5)
 # Floating point contraction must be suppressed due to accuracy issues
-list(APPEND CXXFLAGS -ffp-contract=off -DFMA_DISABLED=1)
-list(APPEND CFLAGS -ffp-contract=off -DFMA_DISABLED=1)
+list(APPEND CXXFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
+list(APPEND CFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
 
 llvm_singlesource()
diff --git a/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/gesummv/CMakeLists.txt b/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/gesummv/CMakeLists.txt
--- a/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/gesummv/CMakeLists.txt
+++ b/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/gesummv/CMakeLists.txt
@@ -4,8 +4,8 @@
   list(APPEND CFLAGS -DSMALL_DATASET)
 endif()
 # Floating point contraction must be suppressed due to accuracy issues
-list(APPEND CXXFLAGS -ffp-contract=off -DFMA_DISABLED=1)
-list(APPEND CFLAGS -ffp-contract=off -DFMA_DISABLED=1)
+list(APPEND CXXFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
+list(APPEND CFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
 
 set(HASH_PROGRAM_OUTPUT 1)
 add_definitions(-DFP_ABSTOLERANCE=1e-5)
diff --git a/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/symm/CMakeLists.txt b/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/symm/CMakeLists.txt
--- a/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/symm/CMakeLists.txt
+++ b/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/symm/CMakeLists.txt
@@ -4,8 +4,8 @@
   list(APPEND CFLAGS -DSMALL_DATASET)
 endif()
 # Floating point contraction must be suppressed due to accuracy issues
-list(APPEND CXXFLAGS -ffp-contract=off -DFMA_DISABLED=1)
-list(APPEND CFLAGS -ffp-contract=off -DFMA_DISABLED=1)
+list(APPEND CXXFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
+list(APPEND CFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
 
 set(HASH_PROGRAM_OUTPUT 1)
 add_definitions(-DFP_ABSTOLERANCE=1e-5)
diff --git a/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/trisolv/CMakeLists.txt b/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/trisolv/CMakeLists.txt
--- a/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/trisolv/CMakeLists.txt
+++ b/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/trisolv/CMakeLists.txt
@@ -2,8 +2,8 @@
 list(APPEND CFLAGS -I ${CMAKE_SOURCE_DIR}/${POLYBENCH_UTILS} -DPOLYBENCH_DUMP_ARRAYS)
 set(HASH_PROGRAM_OUTPUT 1)
 # Floating point contraction must be suppressed due to accuracy issues
-list(APPEND CXXFLAGS -ffp-contract=off -DFMA_DISABLED=1)
-list(APPEND CFLAGS -ffp-contract=off -DFMA_DISABLED=1)
+list(APPEND CXXFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
+list(APPEND CFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
 
 add_definitions(-DFP_ABSTOLERANCE=1e-5)
 llvm_singlesource()
diff --git a/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/trmm/CMakeLists.txt b/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/trmm/CMakeLists.txt
--- a/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/trmm/CMakeLists.txt
+++ b/SingleSource/Benchmarks/Polybench/linear-algebra/kernels/trmm/CMakeLists.txt
@@ -4,8 +4,8 @@
   list(APPEND CFLAGS -DSMALL_DATASET)
 endif()
 # Floating point contraction must be suppressed due to accuracy issues
-list(APPEND CXXFLAGS -ffp-contract=off -DFMA_DISABLED=1)
-list(APPEND CFLAGS -ffp-contract=off -DFMA_DISABLED=1)
+list(APPEND CXXFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
+list(APPEND CFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
 
 set(HASH_PROGRAM_OUTPUT 1)
 add_definitions(-DFP_ABSTOLERANCE=1e-5)
diff --git a/SingleSource/Benchmarks/Polybench/linear-algebra/solvers/gramschmidt/CMakeLists.txt b/SingleSource/Benchmarks/Polybench/linear-algebra/solvers/gramschmidt/CMakeLists.txt
--- a/SingleSource/Benchmarks/Polybench/linear-algebra/solvers/gramschmidt/CMakeLists.txt
+++ b/SingleSource/Benchmarks/Polybench/linear-algebra/solvers/gramschmidt/CMakeLists.txt
@@ -4,8 +4,8 @@
   list(APPEND CFLAGS -DSMALL_DATASET)
 endif()
 # Floating point contraction must be suppressed due to accuracy issues
-list(APPEND CXXFLAGS -ffp-contract=off -DFMA_DISABLED=1)
-list(APPEND CFLAGS -ffp-contract=off -DFMA_DISABLED=1)
+list(APPEND CXXFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
+list(APPEND CFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
 
 set(HASH_PROGRAM_OUTPUT 1)
 add_definitions(-DFP_ABSTOLERANCE=1e-5)
diff --git a/SingleSource/Benchmarks/Polybench/stencils/adi/CMakeLists.txt b/SingleSource/Benchmarks/Polybench/stencils/adi/CMakeLists.txt
--- a/SingleSource/Benchmarks/Polybench/stencils/adi/CMakeLists.txt
+++ b/SingleSource/Benchmarks/Polybench/stencils/adi/CMakeLists.txt
@@ -4,8 +4,8 @@
   list(APPEND CFLAGS -DSMALL_DATASET)
 endif()
 # Floating point contraction must be suppressed due to accuracy issues
-list(APPEND CXXFLAGS -ffp-contract=off -DFMA_DISABLED=1)
-list(APPEND CFLAGS -ffp-contract=off -DFMA_DISABLED=1)
+list(APPEND CXXFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
+list(APPEND CFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
 
 set(HASH_PROGRAM_OUTPUT 1)
 add_definitions(-DFP_ABSTOLERANCE=1e-5)
diff --git a/SingleSource/UnitTests/Vector/SSE/CMakeLists.txt b/SingleSource/UnitTests/Vector/SSE/CMakeLists.txt
--- a/SingleSource/UnitTests/Vector/SSE/CMakeLists.txt
+++ b/SingleSource/UnitTests/Vector/SSE/CMakeLists.txt
@@ -2,4 +2,7 @@
 list(APPEND LDFLAGS -lm)
 list(APPEND TARGET_FLAGS -msse2)
 list(APPEND LCCFLAGS -msse2)
+# Floating point contraction must be suppressed due to accuracy issues
+list(APPEND CXXFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
+list(APPEND CFLAGS -ffp-contract=fast -DFMA_DISABLED=1)
 llvm_singlesource(PREFIX "Vector-")