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authorChad Rosier <mcrosier@apple.com>2013-04-24 18:09:54 +0000
committerChad Rosier <mcrosier@apple.com>2013-04-24 18:09:54 +0000
commitb71f6aa33c1aa2cd4521198356703f2788c5397c (patch)
treeae29810a1845e88b5b9c3d64f5a7a1731fbe0748 /clang/test/Driver/Ofast.c
parentcba3b88da55c24b95181c71e658d6f7eae8ffc3d (diff)
downloadbcm5719-llvm-b71f6aa33c1aa2cd4521198356703f2788c5397c.tar.gz
bcm5719-llvm-b71f6aa33c1aa2cd4521198356703f2788c5397c.zip
[driver] Improve the implementation of the -Ofast option.
Specifically, allow the flags that fall under this umbrella (i.e., -O3, -ffast-math, and -fstrict-aliasing) to be overridden/disabled with the individual -O[0|1|2|s|z]/-fno- flags. This also fixes the handling of various floating point optimization flags that are modified by -ffast-math (and thus -Ofast as well). Part of rdar://13622687 llvm-svn: 180204
Diffstat (limited to 'clang/test/Driver/Ofast.c')
-rw-r--r--clang/test/Driver/Ofast.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/clang/test/Driver/Ofast.c b/clang/test/Driver/Ofast.c
new file mode 100644
index 00000000000..bceeb8f5fe3
--- /dev/null
+++ b/clang/test/Driver/Ofast.c
@@ -0,0 +1,20 @@
+// RUN: %clang -Ofast -### %s 2>&1 | FileCheck -check-prefix=CHECK-OFAST %s
+// RUN: %clang -fno-fast-math -Ofast -### %s 2>&1 | FileCheck -check-prefix=CHECK-OFAST %s
+// RUN: %clang -fno-strict-aliasing -Ofast -### %s 2>&1 | FileCheck -check-prefix=CHECK-OFAST %s
+// RUN: %clang -Ofast -fno-fast-math -### %s 2>&1 | FileCheck -check-prefix=CHECK-OFAST-NO-FAST-MATH %s
+// RUN: %clang -Ofast -fno-strict-aliasing -### %s 2>&1 | FileCheck -check-prefix=CHECK-OFAST-NO-STRICT-ALIASING %s
+
+// CHECK-OFAST: -cc1
+// CHECK-OFAST-NOT: -relaxed-aliasing
+// CHECK-OFAST: -ffast-math
+// CHECK-OFAST: -Ofast
+
+// CHECK-OFAST-NO-FAST-MATH: -cc1
+// CHECK-OFAST-NO-FAST-MATH-NOT: -relaxed-aliasing
+// CHECK-OFAST-NO-FAST-MATH-NOT: -ffast-math
+// CHECK-OFAST-NO-FAST-MATH: -Ofast
+
+// CHECK-OFAST-NO-STRICT-ALIASING: -cc1
+// CHECK-OFAST-NO-STRICT-ALIASING: -relaxed-aliasing
+// CHECK-OFAST-NO-STRICT-ALIASING: -ffast-math
+// CHECK-OFAST-NO-STRICT-ALIASING: -Ofast
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