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| author | Chris Lattner <sabre@nondot.org> | 2009-03-18 00:43:52 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2009-03-18 00:43:52 +0000 |
| commit | ff81ebf7586fa7992353ed44a8c9d564130fb734 (patch) | |
| tree | 27221c42cf2a4d0b823fdb9dec27b2ef3a4acbce /test/CodeGen | |
| parent | bda0765e0763cd7d9b0980328fc1d718a6773628 (diff) | |
| download | external_llvm-ff81ebf7586fa7992353ed44a8c9d564130fb734.zip external_llvm-ff81ebf7586fa7992353ed44a8c9d564130fb734.tar.gz external_llvm-ff81ebf7586fa7992353ed44a8c9d564130fb734.tar.bz2 | |
Disable the "call to immediate" optimization on x86-64. It is
not safe in general because the immediate could be an arbitrary
value that does not fit in a 32-bit pcrel displacement.
Conservatively fall back to loading the value into a register
and calling through it.
We still do the optzn on X86-32.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67142 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen')
| -rw-r--r-- | test/CodeGen/X86/call-imm.ll | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/test/CodeGen/X86/call-imm.ll b/test/CodeGen/X86/call-imm.ll index b99149b..8233d86 100644 --- a/test/CodeGen/X86/call-imm.ll +++ b/test/CodeGen/X86/call-imm.ll @@ -1,6 +1,10 @@ -; RUN: llvm-as < %s | llc -march=x86 | grep call | not grep {*} -; RUN: llvm-as < %s | llc -march=x86 | grep call | grep 12345678 -; RUN: llvm-as < %s | llc -march=x86-64 | grep call | grep 12345678 +; RUN: llvm-as < %s | llc -march=x86 | grep {call.*12345678} + +; Call to immediate is not safe on x86-64 unless we *know* that the +; call will be within 32-bits pcrel from the dest immediate. + +; RUN: llvm-as < %s | llc -march=x86-64 | grep {call.*\*%rax} + ; PR3666 ; PR3773 |