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llvm-project/clang/test/Frontend/gnu-mcount.c

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[clang] Limit clang test to ARM and AArch64 only Summary: Limit clang/test/Frontend/gnu-mcount.c to ARM and AArch64 only. Reviewers: abdulras, honggyu.kim, rengolin Subscribers: aemerson, rengolin, cfe-commits Tags: #clang-c Differential Revision: https://reviews.llvm.org/D25842 llvm-svn: 284931
2016-10-23 08:53:03 +08:00
// REQUIRES: arm-registered-target,aarch64-registered-target
Add support for __gnu_mcount_nc as the pg interface This adds support to optionally support using `__gnu_mcount_nc` as the mcount interface rather than `mcount` for Linux and EABI. The other targets do not provide an implementation for `__gnu_mcount_nc`. This can be activated via the `-meabi gnu` flag. Resolves PR23969. llvm-svn: 265888
2016-04-10 11:19:47 +08:00
// RUN: %clang -target armv7-unknown-none-eabi -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI
// RUN: %clang -target armv7-unknown-none-eabi -pg -meabi gnu -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-MEABI-GNU
Correct pg instrumentation for AArch64 It seems that there was a miscommunication between Renato and I, and the original behaviour of AArch64 was to be preserved and not to mirror the new behaviour. Restore the original behaviour for AArch64. Addresses post-commit review comments from Renato Golin. llvm-svn: 265899
2016-04-10 22:29:55 +08:00
// RUN: %clang -target aarch64-unknown-none-eabi -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI
Basic: fix profiling with GNU EABI The GNU profiling support indicates that the interface is `_mcount` rather than `mcount`. Conditionalise the behaviour according to the `-meabi gnu` flag. Resolves PR27311 llvm-svn: 266039
2016-04-12 11:05:03 +08:00
// RUN: %clang -target aarch64-unknown-none-eabi -pg -meabi gnu -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-MEABI-GNU
Add support for __gnu_mcount_nc as the pg interface This adds support to optionally support using `__gnu_mcount_nc` as the mcount interface rather than `mcount` for Linux and EABI. The other targets do not provide an implementation for `__gnu_mcount_nc`. This can be activated via the `-meabi gnu` flag. Resolves PR23969. llvm-svn: 265888
2016-04-10 11:19:47 +08:00
// RUN: %clang -target armv7-unknown-linux-gnueabi -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI
// RUN: %clang -target armv7-unknown-linux-gnueabi -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-MEABI-GNU
Migrate all of aarch64-linux-gnu to \01_mcount instead of just when passing along gnueabi as this matches both gcc and what the kernel expects. More of PR27311 llvm-svn: 296490
2017-03-01 01:22:05 +08:00
// RUN: %clang -target aarch64-unknown-linux-gnueabi -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-LINUX
Basic: fix profiling with GNU EABI The GNU profiling support indicates that the interface is `_mcount` rather than `mcount`. Conditionalise the behaviour according to the `-meabi gnu` flag. Resolves PR27311 llvm-svn: 266039
2016-04-12 11:05:03 +08:00
// RUN: %clang -target aarch64-unknown-linux-gnueabi -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-MEABI-GNU
Add support for __gnu_mcount_nc as the pg interface This adds support to optionally support using `__gnu_mcount_nc` as the mcount interface rather than `mcount` for Linux and EABI. The other targets do not provide an implementation for `__gnu_mcount_nc`. This can be activated via the `-meabi gnu` flag. Resolves PR23969. llvm-svn: 265888
2016-04-10 11:19:47 +08:00
// RUN: %clang -target armv7-unknown-linux-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI
// RUN: %clang -target armv7-unknown-linux-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-MEABI-GNU
Migrate all of aarch64-linux-gnu to \01_mcount instead of just when passing along gnueabi as this matches both gcc and what the kernel expects. More of PR27311 llvm-svn: 296490
2017-03-01 01:22:05 +08:00
// RUN: %clang -target aarch64-unknown-linux-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-LINUX
Basic: fix profiling with GNU EABI The GNU profiling support indicates that the interface is `_mcount` rather than `mcount`. Conditionalise the behaviour according to the `-meabi gnu` flag. Resolves PR27311 llvm-svn: 266039
2016-04-12 11:05:03 +08:00
// RUN: %clang -target aarch64-unknown-linux-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-MEABI-GNU
Add support for __gnu_mcount_nc as the pg interface This adds support to optionally support using `__gnu_mcount_nc` as the mcount interface rather than `mcount` for Linux and EABI. The other targets do not provide an implementation for `__gnu_mcount_nc`. This can be activated via the `-meabi gnu` flag. Resolves PR23969. llvm-svn: 265888
2016-04-10 11:19:47 +08:00
// RUN: %clang -target armv7-unknown-freebsd-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-FREEBSD
// RUN: %clang -target armv7-unknown-freebsd-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-FREEBSD
test: add additional tests for SVN r265888 Add test cases for AArch64 as well as that was changed as part of that change. llvm-svn: 265889
2016-04-10 11:31:09 +08:00
// RUN: %clang -target aarch64-unknown-freebsd-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-FREEBSD
// RUN: %clang -target aarch64-unknown-freebsd-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-FREEBSD
Add support for __gnu_mcount_nc as the pg interface This adds support to optionally support using `__gnu_mcount_nc` as the mcount interface rather than `mcount` for Linux and EABI. The other targets do not provide an implementation for `__gnu_mcount_nc`. This can be activated via the `-meabi gnu` flag. Resolves PR23969. llvm-svn: 265888
2016-04-10 11:19:47 +08:00
// RUN: %clang -target armv7-unknown-openbsd-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-OPENBSD
// RUN: %clang -target armv7-unknown-openbsd-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-OPENBSD
Basic: fix profiling with GNU EABI The GNU profiling support indicates that the interface is `_mcount` rather than `mcount`. Conditionalise the behaviour according to the `-meabi gnu` flag. Resolves PR27311 llvm-svn: 266039
2016-04-12 11:05:03 +08:00
// RUN: %clang -target aarch64-unknown-openbsd-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-OPENBSD
// RUN: %clang -target aarch64-unknown-openbsd-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-OPENBSD
Add support for __gnu_mcount_nc as the pg interface This adds support to optionally support using `__gnu_mcount_nc` as the mcount interface rather than `mcount` for Linux and EABI. The other targets do not provide an implementation for `__gnu_mcount_nc`. This can be activated via the `-meabi gnu` flag. Resolves PR23969. llvm-svn: 265888
2016-04-10 11:19:47 +08:00
// RUN: %clang -target armv7-unknown-netbsd-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-NETBSD
// RUN: %clang -target armv7-unknown-netbsd-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-NETBSD
Correct pg instrumentation for AArch64 It seems that there was a miscommunication between Renato and I, and the original behaviour of AArch64 was to be preserved and not to mirror the new behaviour. Restore the original behaviour for AArch64. Addresses post-commit review comments from Renato Golin. llvm-svn: 265899
2016-04-10 22:29:55 +08:00
// RUN: %clang -target aarch64-unknown-netbsd-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-NETBSD
// RUN: %clang -target aarch64-unknown-netbsd-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-NETBSD
Add support for __gnu_mcount_nc as the pg interface This adds support to optionally support using `__gnu_mcount_nc` as the mcount interface rather than `mcount` for Linux and EABI. The other targets do not provide an implementation for `__gnu_mcount_nc`. This can be activated via the `-meabi gnu` flag. Resolves PR23969. llvm-svn: 265888
2016-04-10 11:19:47 +08:00
// RUN: %clang -target armv7-apple-ios -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-IOS
// RUN: %clang -target armv7-apple-ios -pg -meabi gnu -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-IOS
test: add additional tests for SVN r265888 Add test cases for AArch64 as well as that was changed as part of that change. llvm-svn: 265889
2016-04-10 11:31:09 +08:00
// RUN: %clang -target arm64-apple-ios -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-IOS
// RUN: %clang -target arm64-apple-ios -pg -meabi gnu -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-IOS
Add support for __gnu_mcount_nc as the pg interface This adds support to optionally support using `__gnu_mcount_nc` as the mcount interface rather than `mcount` for Linux and EABI. The other targets do not provide an implementation for `__gnu_mcount_nc`. This can be activated via the `-meabi gnu` flag. Resolves PR23969. llvm-svn: 265888
2016-04-10 11:19:47 +08:00
// RUN: %clang -target armv7-unknown-bitrig-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-BIGRIG
// RUN: %clang -target armv7-unknown-bitrig-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-BIGRIG
Basic: fix profiling with GNU EABI The GNU profiling support indicates that the interface is `_mcount` rather than `mcount`. Conditionalise the behaviour according to the `-meabi gnu` flag. Resolves PR27311 llvm-svn: 266039
2016-04-12 11:05:03 +08:00
// RUN: %clang -target aarch64-unknown-bitrig-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-BITRIG
// RUN: %clang -target aarch64-unknown-bitrig-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-BITRIG
Add support for __gnu_mcount_nc as the pg interface This adds support to optionally support using `__gnu_mcount_nc` as the mcount interface rather than `mcount` for Linux and EABI. The other targets do not provide an implementation for `__gnu_mcount_nc`. This can be activated via the `-meabi gnu` flag. Resolves PR23969. llvm-svn: 265888
2016-04-10 11:19:47 +08:00
// RUN: %clang -target armv7-unknown-rtems-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-RTEMS
// RUN: %clang -target armv7-unknown-rtems-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-RTEMS
Basic: fix profiling with GNU EABI The GNU profiling support indicates that the interface is `_mcount` rather than `mcount`. Conditionalise the behaviour according to the `-meabi gnu` flag. Resolves PR27311 llvm-svn: 266039
2016-04-12 11:05:03 +08:00
// RUN: %clang -target aarch64-unknown-rtems-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-RTEMS
// RUN: %clang -target aarch64-unknown-rtems-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-RTEMS
Add support for __gnu_mcount_nc as the pg interface This adds support to optionally support using `__gnu_mcount_nc` as the mcount interface rather than `mcount` for Linux and EABI. The other targets do not provide an implementation for `__gnu_mcount_nc`. This can be activated via the `-meabi gnu` flag. Resolves PR23969. llvm-svn: 265888
2016-04-10 11:19:47 +08:00
// RUN: %clang -target armv7-unknown-cloudabi-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-CLOUDABI
// RUN: %clang -target armv7-unknown-cloudabi-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-CLOUDABI
Basic: fix profiling with GNU EABI The GNU profiling support indicates that the interface is `_mcount` rather than `mcount`. Conditionalise the behaviour according to the `-meabi gnu` flag. Resolves PR27311 llvm-svn: 266039
2016-04-12 11:05:03 +08:00
// RUN: %clang -target aarch64-unknown-cloudabi-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-CLOUDABI
// RUN: %clang -target aarch64-unknown-cloudabi-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-CLOUDABI
Add support for __gnu_mcount_nc as the pg interface This adds support to optionally support using `__gnu_mcount_nc` as the mcount interface rather than `mcount` for Linux and EABI. The other targets do not provide an implementation for `__gnu_mcount_nc`. This can be activated via the `-meabi gnu` flag. Resolves PR23969. llvm-svn: 265888
2016-04-10 11:19:47 +08:00
int f() {
return 0;
}
// CHECK-LABEL: f
[Frontend] Fix mcount inlining bug Since some profiling tools, such as gprof, ftrace, and uftrace, use -pg option to generate a mcount function call at the entry of each function. Function invocation can be detected by this hook function. But mcount insertion is done before function inlining phase in clang, sometime a function that already has a mcount call can be inlined in the middle of another function. This patch adds an attribute "counting-function" to each function rather than emitting the mcount call directly in frontend so that this attribute can be processed in backend. Then the mcount calls can be properly inserted in backend after all the other optimizations are completed. Link: https://llvm.org/bugs/show_bug.cgi?id=28660 Reviewers: hans, rjmccall, hfinkel, rengolin, compnerd Subscribers: shenhan, cfe-commits Differential Revision: https://reviews.llvm.org/D22666 llvm-svn: 280355
2016-09-01 19:29:21 +08:00
// CHECK-ARM-IOS-NOT: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="_mcount"{{.*}} }
// CHECK-ARM-IOS-NOT: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="\01__gnu_mcount_nc"{{.*}} }
// CHECK-ARM-EABI: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="\01mcount"{{.*}} }
// CHECK-ARM-EABI-NOT: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="\01__gnu_mcount_nc"{{.*}} }
// CHECK-ARM64-EABI: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="mcount"{{.*}} }
// CHECK-ARM64-EABI-MEABI-GNU: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="\01_mcount"{{.*}} }
// CHECK-ARM64-EABI-NOT: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="\01__gnu_mcount_nc"{{.*}} }
Migrate all of aarch64-linux-gnu to \01_mcount instead of just when passing along gnueabi as this matches both gcc and what the kernel expects. More of PR27311 llvm-svn: 296490
2017-03-01 01:22:05 +08:00
// CHECK-ARM64-EABI-LINUX: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="\01_mcount"{{.*}} }
[Frontend] Fix mcount inlining bug Since some profiling tools, such as gprof, ftrace, and uftrace, use -pg option to generate a mcount function call at the entry of each function. Function invocation can be detected by this hook function. But mcount insertion is done before function inlining phase in clang, sometime a function that already has a mcount call can be inlined in the middle of another function. This patch adds an attribute "counting-function" to each function rather than emitting the mcount call directly in frontend so that this attribute can be processed in backend. Then the mcount calls can be properly inserted in backend after all the other optimizations are completed. Link: https://llvm.org/bugs/show_bug.cgi?id=28660 Reviewers: hans, rjmccall, hfinkel, rengolin, compnerd Subscribers: shenhan, cfe-commits Differential Revision: https://reviews.llvm.org/D22666 llvm-svn: 280355
2016-09-01 19:29:21 +08:00
// CHECK-ARM-EABI-FREEBSD: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="__mcount"{{.*}} }
// CHECK-ARM-EABI-FREEBSD-NOT: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="\01__gnu_mcount_nc"{{.*}} }
// CHECK-ARM64-EABI-FREEBSD: attributes #{{[0-9]+}} = { {{.*}}"counting-function"=".mcount"{{.*}} }
// CHECK-ARM64-EABI-FREEBSD-NOT: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="\01__gnu_mcount_nc"{{.*}} }
// CHECK-ARM-EABI-NETBSD: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="_mcount"{{.*}} }
// CHECK-ARM-EABI-NETBSD-NOT: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="\01__gnu_mcount_nc"{{.*}} }
// CHECK-ARM-EABI-OPENBSD: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="__mcount"{{.*}} }
// CHECK-ARM-EABI-OPENBSD-NOT: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="\01__gnu_mcount_nc"{{.*}} }
Hook up OpenBSD AArch64 support llvm-svn: 295786
2017-02-22 07:13:09 +08:00
// CHECK-ARM64-EABI-OPENBSD: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="__mcount"{{.*}} }
[Frontend] Fix mcount inlining bug Since some profiling tools, such as gprof, ftrace, and uftrace, use -pg option to generate a mcount function call at the entry of each function. Function invocation can be detected by this hook function. But mcount insertion is done before function inlining phase in clang, sometime a function that already has a mcount call can be inlined in the middle of another function. This patch adds an attribute "counting-function" to each function rather than emitting the mcount call directly in frontend so that this attribute can be processed in backend. Then the mcount calls can be properly inserted in backend after all the other optimizations are completed. Link: https://llvm.org/bugs/show_bug.cgi?id=28660 Reviewers: hans, rjmccall, hfinkel, rengolin, compnerd Subscribers: shenhan, cfe-commits Differential Revision: https://reviews.llvm.org/D22666 llvm-svn: 280355
2016-09-01 19:29:21 +08:00
// CHECK-ARM64-EABI-OPENBSD-NOT: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="\01__gnu_mcount_nc"{{.*}} }
// CHECK-ARM-EABI-MEABI-GNU-NOT: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="mcount"{{.*}} }
// CHECK-ARM-EABI-MEABI-GNU: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="\01__gnu_mcount_nc"{{.*}} }
// CHECK-ARM-EABI-BITRIG: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="__mcount"{{.*}} }
// CHECK-ARM-EABI-BITRIG-NOT: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="\01__gnu_mcount_nc"{{.*}} }
// CHECK-ARM54-EABI-BITRIG: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="mcount"{{.*}} }
// CHECK-ARM54-EABI-BITRIG-NOT: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="\01__gnu_mcount_nc"{{.*}} }
// CHECK-ARM-EABI-RTEMS: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="mcount"{{.*}} }
// CHECK-ARM-EABI-RTEMS-NOT: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="\01__gnu_mcount_nc"{{.*}} }
// CHECK-ARM64-EABI-RTEMS: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="mcount"{{.*}} }
// CHECK-ARM64-EABI-RTEMS-NOT: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="\01__gnu_mcount_nc"{{.*}} }
// CHECK-ARM-EABI-CLOUDABI: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="mcount"{{.*}} }
// CHECK-ARM-EABI-CLOUDABI-NOT: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="\01__gnu_mcount_nc"{{.*}} }
// CHECK-ARM64-EABI-CLOUDABI: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="mcount"{{.*}} }
// CHECK-ARM64-EABI-CLOUDABI-NOT: attributes #{{[0-9]+}} = { {{.*}}"counting-function"="\01__gnu_mcount_nc"{{.*}} }
Basic: fix profiling with GNU EABI The GNU profiling support indicates that the interface is `_mcount` rather than `mcount`. Conditionalise the behaviour according to the `-meabi gnu` flag. Resolves PR27311 llvm-svn: 266039
2016-04-12 11:05:03 +08:00