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Don't imply -flto with -O4. 

We now saturate at -O3.

llvm-svn: 189149
This commit is contained in:
Rafael Espindola 2013-08-23 21:49:00 +00:00
parent 4b3c7ffc64
commit 493f045e75
5 changed files with 6 additions and 18 deletions
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2
clang/docs/ReleaseNotes.rst
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@ -59,6 +59,8 @@ about them. The improvements since the 3.3 release include:
New Compiler Flags
------------------
- Clang no longer special cases -O4 to enable lto. Explicitly pass -flto to
enable it.
- ...
C Language Changes in Clang

4
clang/lib/Driver/Driver.cpp
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@ -1359,10 +1359,6 @@ bool Driver::IsUsingLTO(const ArgList &Args) const {
if (Args.hasFlag(options::OPT_flto, options::OPT_fno_lto, false))
return true;
// Check for -O4.
if (const Arg *A = Args.getLastArg(options::OPT_O_Group))
return A->getOption().matches(options::OPT_O4);
return false;
}

4
clang/test/Driver/clang_f_opts.c
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@ -56,7 +56,6 @@
// RUN: %clang -### -S -O2 %s 2>&1 | FileCheck -check-prefix=CHECK-VECTORIZE %s
// RUN: %clang -### -S -Os %s 2>&1 | FileCheck -check-prefix=CHECK-VECTORIZE %s
// RUN: %clang -### -S -O3 %s 2>&1 | FileCheck -check-prefix=CHECK-VECTORIZE %s
// RUN: %clang -### -S -O4 %s 2>&1 | FileCheck -check-prefix=CHECK-VECTORIZE %s
// RUN: %clang -### -S -fno-vectorize -O3 %s 2>&1 | FileCheck -check-prefix=CHECK-VECTORIZE %s
// RUN: %clang -### -S -O1 -fvectorize %s 2>&1 | FileCheck -check-prefix=CHECK-VECTORIZE %s
// RUN: %clang -### -S -Ofast %s 2>&1 | FileCheck -check-prefix=CHECK-VECTORIZE %s
@ -96,3 +95,6 @@
// RUN: %clang -### -S -fpascal-strings -mno-pascal-strings %s 2>&1 | FileCheck -check-prefix=CHECK-NO-M-PASCAL-STRINGS %s
// CHECK-NO-M-PASCAL-STRINGS-NOT: "-fpascal-strings"
// RUN: %clang -### -S -O4 %s 2>&1 | FileCheck -check-prefix=CHECK-MAX-O %s
// CHECK-MAX-O: -O3

10
clang/test/Driver/emit-llvm.c
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@ -1,10 +0,0 @@
// Check that -O4 is only honored as the effective -O option.
// <rdar://problem/7046672> clang/loader problem
// RUN: %clang -ccc-print-phases -c -O4 -O0 %s 2> %t
// RUN: FileCheck --check-prefix=O4_AND_O0 %s < %t
// O4_AND_O0: 0: input, "{{.*}}", c
// O4_AND_O0: 1: preprocessor, {0}, cpp-output
// O4_AND_O0: 2: compiler, {1}, assembler
// O4_AND_O0: 3: assembler, {2}, object

4
clang/test/Driver/lto.c
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@ -1,8 +1,6 @@
// -flto and -O4 both cause a switch to llvm-bc object files.
// -flto causes a switch to llvm-bc object files.
// RUN: %clang -ccc-print-phases -c %s -flto 2> %t.log
// RUN: grep '2: compiler, {1}, lto-bc' %t.log
// RUN: %clang -ccc-print-phases -c %s -O4 2> %t.log
// RUN: grep '2: compiler, {1}, lto-bc' %t.log
// RUN: %clang -ccc-print-phases %s -flto 2> %t.log
// RUN: grep '0: input, ".*lto.c", c' %t.log