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Disable tail call optimization and use -mstackrealign to boot up on fugu. 

http://llvm.org/bugs/show_bug.cgi?id=15086,
llvm tail call optimization is wrong for x86.

For Android/x86 to use SSE* instructions safely, stack should be 16-byte
aligned before JNI function call, which isn't true for all x86 device,
so -mstackrealign should be the default.

BUG: 19234330
Change-Id: I4c6676366788772dbe64fd7f0dd33b3ed5c9b80e
This commit is contained in:
Chih-Hung Hsieh 2015-02-24 16:06:15 -08:00
parent 4eec22a662
commit 73e734bea5
1 changed files with 9 additions and 1 deletions
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10
core/clang/TARGET_x86.mk
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@ -18,7 +18,15 @@ CLANG_CONFIG_x86_TARGET_EXTRA_CFLAGS := \
$(CLANG_CONFIG_EXTRA_CFLAGS) \
$(CLANG_CONFIG_TARGET_EXTRA_CFLAGS) \
$(CLANG_CONFIG_x86_EXTRA_CFLAGS) \
$(CLANG_CONFIG_x86_TARGET_EXTRA_ASFLAGS)
$(CLANG_CONFIG_x86_TARGET_EXTRA_ASFLAGS) \
-fno-optimize-sibling-calls \
-mstackrealign
# http://llvm.org/bugs/show_bug.cgi?id=15086,
# llvm tail call optimization is wrong for x86.
# -mstackrealign is needed to realign stack in native code
# that could be called from JNI, so that movaps instruction
# will work on assumed stack aligned local variables.
CLANG_CONFIG_x86_TARGET_EXTRA_CONLYFLAGS := \
$(CLANG_CONFIG_EXTRA_CONLYFLAGS) \