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| author | Yury Gribov <y.gribov@samsung.com> | 2015-12-01 11:40:55 +0000 |
|---|---|---|
| committer | Yury Gribov <y.gribov@samsung.com> | 2015-12-01 11:40:55 +0000 |
| commit | d7dbb66eb8fbcc73891aca2bef750d6e5f1faf98 (patch) | |
| tree | b10e85909d2c0a0500be275e7f4b94850ae95d55 /llvm/lib/CodeGen/IntrinsicLowering.cpp | |
| parent | df55f522bd6eb42e81c5723375ac329dc3aa97be (diff) | |
| download | bcm5719-llvm-d7dbb66eb8fbcc73891aca2bef750d6e5f1faf98.tar.gz bcm5719-llvm-d7dbb66eb8fbcc73891aca2bef750d6e5f1faf98.zip | |
Introduce new @llvm.get.dynamic.area.offset.i{32, 64} intrinsics.
The @llvm.get.dynamic.area.offset.* intrinsic family is used to get the offset
from native stack pointer to the address of the most recent dynamic alloca on
the caller's stack. These intrinsics are intendend for use in combination with
@llvm.stacksave and @llvm.restore to get a pointer to the most recent dynamic
alloca. This is useful, for example, for AddressSanitizer's stack unpoisoning
routines.
Patch by Max Ostapenko.
Differential Revision: http://reviews.llvm.org/D14983
llvm-svn: 254404
Diffstat (limited to 'llvm/lib/CodeGen/IntrinsicLowering.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/IntrinsicLowering.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/IntrinsicLowering.cpp b/llvm/lib/CodeGen/IntrinsicLowering.cpp index 5b895fff5c4..47a9f64e908 100644 --- a/llvm/lib/CodeGen/IntrinsicLowering.cpp +++ b/llvm/lib/CodeGen/IntrinsicLowering.cpp @@ -424,6 +424,13 @@ void IntrinsicLowering::LowerIntrinsicCall(CallInst *CI) { break; } + case Intrinsic::get_dynamic_area_offset: + errs() << "WARNING: this target does not support the custom llvm.get." + "dynamic.area.offset. It is being lowered to a constant 0\n"; + // Just lower it to a constant 0 because for most targets + // @llvm.get.dynamic.area.offset is lowered to zero. + CI->replaceAllUsesWith(ConstantInt::get(CI->getType(), 0)); + break; case Intrinsic::returnaddress: case Intrinsic::frameaddress: errs() << "WARNING: this target does not support the llvm." |
