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| author | Manman Ren <mren@apple.com> | 2013-03-16 00:11:09 +0000 |
|---|---|---|
| committer | Manman Ren <mren@apple.com> | 2013-03-16 00:11:09 +0000 |
| commit | 58dd990c112ada1d37813f95fe4a929dee46a476 (patch) | |
| tree | 324603211c02df299940f38a52e59c6f269f0631 /clang/test/CodeGenCXX/arm.cpp | |
| parent | 63bff2eb395671debc517b0d1599f99324f4e124 (diff) | |
| download | bcm5719-llvm-58dd990c112ada1d37813f95fe4a929dee46a476.tar.gz bcm5719-llvm-58dd990c112ada1d37813f95fe4a929dee46a476.zip | |
Exploit this-return of a callsite in a this-return function.
For constructors/desctructors that return 'this', if there exists a callsite
that returns 'this' and is immediately before the return instruction, make
sure we are using the return value from the callsite.
We don't need to keep 'this' alive through the callsite. It also enables
optimizations in the backend, such as tail call optimization.
rdar://12818789
llvm-svn: 177211
Diffstat (limited to 'clang/test/CodeGenCXX/arm.cpp')
| -rw-r--r-- | clang/test/CodeGenCXX/arm.cpp | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/clang/test/CodeGenCXX/arm.cpp b/clang/test/CodeGenCXX/arm.cpp index 3d3b147aa1f..48f2f008401 100644 --- a/clang/test/CodeGenCXX/arm.cpp +++ b/clang/test/CodeGenCXX/arm.cpp @@ -56,15 +56,15 @@ namespace test1 { // CHECK: [[THIS:%.*]] = alloca [[A]]*, align 4 // CHECK: store [[A]]* {{.*}}, [[A]]** [[THIS]] // CHECK: [[THIS1:%.*]] = load [[A]]** [[THIS]] - // CHECK: call [[A]]* @_ZN5test11AC2Ei( - // CHECK: ret [[A]]* [[THIS1]] + // CHECK: [[THIS2:%.*]] = call [[A]]* @_ZN5test11AC2Ei( + // CHECK: ret [[A]]* [[THIS2]] // CHECK: define linkonce_odr [[A]]* @_ZN5test11AD1Ev([[A]]* %this) unnamed_addr // CHECK: [[THIS:%.*]] = alloca [[A]]*, align 4 // CHECK: store [[A]]* {{.*}}, [[A]]** [[THIS]] // CHECK: [[THIS1:%.*]] = load [[A]]** [[THIS]] - // CHECK: call [[A]]* @_ZN5test11AD2Ev( - // CHECK: ret [[A]]* [[THIS1]] + // CHECK: [[THIS2:%.*]] = call [[A]]* @_ZN5test11AD2Ev( + // CHECK: ret [[A]]* [[THIS2]] } // Awkward virtual cases. |
