diff --git a/cc/config/arm64_device.go b/cc/config/arm64_device.go
index c3dd8e840..5bb7749a8 100644
--- a/cc/config/arm64_device.go
+++ b/cc/config/arm64_device.go
@@ -25,13 +25,6 @@ var (
 	arm64Cflags = []string{
 		// Help catch common 32/64-bit errors.
 		"-Werror=implicit-function-declaration",
-
-		"-fno-strict-volatile-bitfields",
-
-		// TARGET_RELEASE_CFLAGS
-		"-fgcse-after-reload",
-		"-frerun-cse-after-loop",
-		"-frename-registers",
 	}
 
 	arm64Ldflags = []string{
diff --git a/cc/config/arm_device.go b/cc/config/arm_device.go
index 1b09242e7..0f28d1e28 100644
--- a/cc/config/arm_device.go
+++ b/cc/config/arm_device.go
@@ -28,14 +28,6 @@ var (
 	}
 
 	armCflags = []string{
-		"-fno-builtin-sin",
-		"-fno-strict-volatile-bitfields",
-
-		// TARGET_RELEASE_CFLAGS
-		"-fgcse-after-reload",
-		"-frerun-cse-after-loop",
-		"-frename-registers",
-
 		"-fomit-frame-pointer",
 	}
 
@@ -49,7 +41,6 @@ var (
 
 	armArmCflags = []string{
 		"-fstrict-aliasing",
-		"-funswitch-loops",
 	}
 
 	armThumbCflags = []string{
diff --git a/cc/config/mips64_device.go b/cc/config/mips64_device.go
index 97d6a7201..a6191b653 100644
--- a/cc/config/mips64_device.go
+++ b/cc/config/mips64_device.go
@@ -22,17 +22,10 @@ import (
 
 var (
 	mips64Cflags = []string{
-		"-fomit-frame-pointer",
-		"-funswitch-loops",
 		"-Umips",
 
 		// Help catch common 32/64-bit errors.
 		"-Werror=implicit-function-declaration",
-
-		// TARGET_RELEASE_CFLAGS
-		"-fgcse-after-reload",
-		"-frerun-cse-after-loop",
-		"-frename-registers",
 	}
 
 	mips64ClangCflags = append(mips64Cflags, []string{
diff --git a/cc/config/mips_device.go b/cc/config/mips_device.go
index 9cd8b5fb0..9709ada47 100644
--- a/cc/config/mips_device.go
+++ b/cc/config/mips_device.go
@@ -23,13 +23,7 @@ import (
 var (
 	mipsCflags = []string{
 		"-fomit-frame-pointer",
-		"-funswitch-loops",
 		"-Umips",
-
-		// TARGET_RELEASE_CFLAGS
-		"-fgcse-after-reload",
-		"-frerun-cse-after-loop",
-		"-frename-registers",
 	}
 
 	mipsClangCflags = append(mipsCflags, []string{
diff --git a/cc/config/x86_64_device.go b/cc/config/x86_64_device.go
index e461c457f..12f3e6fa2 100644
--- a/cc/config/x86_64_device.go
+++ b/cc/config/x86_64_device.go
@@ -22,10 +22,6 @@ import (
 
 var (
 	x86_64Cflags = []string{
-		"-finline-functions",
-		"-finline-limit=300",
-		"-funswitch-loops",
-
 		// Help catch common 32/64-bit errors.
 		"-Werror=implicit-function-declaration",
 	}
diff --git a/cc/config/x86_device.go b/cc/config/x86_device.go
index 8fd65f7ac..b9ce4af3e 100644
--- a/cc/config/x86_device.go
+++ b/cc/config/x86_device.go
@@ -21,11 +21,7 @@ import (
 )
 
 var (
-	x86Cflags = []string{
-		"-finline-functions",
-		"-finline-limit=300",
-		"-funswitch-loops",
-	}
+	x86Cflags = []string{}
 
 	x86ClangCflags = append(x86Cflags, []string{
 		"-msse3",