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author | Chris Lattner <sabre@nondot.org> | 2009-11-01 18:57:49 +0000 |
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committer | Chris Lattner <sabre@nondot.org> | 2009-11-01 18:57:49 +0000 |
commit | 45ad5c40eb868d053ddbd2296a26c02882c6bd37 (patch) | |
tree | b8c29fda7939467baa0987c01ddc5d94e640e939 /test/FrontendC++ | |
parent | c3ce1a63e4891b7c53dbdde5dffb49b45f5672de (diff) | |
download | external_llvm-45ad5c40eb868d053ddbd2296a26c02882c6bd37.zip external_llvm-45ad5c40eb868d053ddbd2296a26c02882c6bd37.tar.gz external_llvm-45ad5c40eb868d053ddbd2296a26c02882c6bd37.tar.bz2 |
We currently only run ipsccp at LTO time, which is silly. It subsumes
ipconstprop and doesn't take much time. Just run it in its place.
This adds a testcase for it, which I plan to expand to cover other
"integration" cases, where we expect the optimizer to be able to
eliminate various things. Due to phase order issues we've regressed
in a number of areas and integration tests are the only way I see to
prevent this.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85729 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/FrontendC++')
-rw-r--r-- | test/FrontendC++/integration-O2.cpp | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/test/FrontendC++/integration-O2.cpp b/test/FrontendC++/integration-O2.cpp new file mode 100644 index 0000000..bb65ac2 --- /dev/null +++ b/test/FrontendC++/integration-O2.cpp @@ -0,0 +1,19 @@ +// RUN: %llvmgxx %s -O2 -S -o - | FileCheck %s + +// This test verifies that we get expected codegen out of the -O2 optimization +// level from the full optimizer. + + + +// Verify that ipsccp is running and can eliminate globals. +static int test1g = 42; +void test1f1() { + if (test1g == 0) test1g = 0; +} +int test1f2() { + return test1g; +} + +// CHECK: @_Z7test1f2v() +// CHECK: entry: +// CHECK-NEXT: ret i32 42 |