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| author | Evan Cheng <evan.cheng@apple.com> | 2008-03-11 07:19:34 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2008-03-11 07:19:34 +0000 |
| commit | 676dd7c80b6f91178452535ac45ca58feb23cc42 (patch) | |
| tree | 33282790f7a542b3ef2f3af7a23646d8f8514a1c /test/CodeGen | |
| parent | 204496d58e7e740f0da6d41c6214a91d67950d26 (diff) | |
When the register allocator runs out of registers, spill a physical register around the def's and use's of the interval being allocated to make it possible for the interval to target a register and spill it right away and restore a register for uses. This likely generates terrible code but is before than aborting.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48218 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen')
| -rw-r--r-- | test/CodeGen/X86/2008-03-10-RegAllocInfLoop.ll | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/test/CodeGen/X86/2008-03-10-RegAllocInfLoop.ll b/test/CodeGen/X86/2008-03-10-RegAllocInfLoop.ll new file mode 100644 index 0000000000..b85859205f --- /dev/null +++ b/test/CodeGen/X86/2008-03-10-RegAllocInfLoop.ll @@ -0,0 +1,14 @@ +; RUN: llvm-as < %s | llc -mtriple=i386-pc-linux-gnu -relocation-model=pic -disable-fp-elim +; PR2134 + +declare fastcc i8* @w_addchar(i8*, i32*, i32*, i8 signext ) nounwind + +define x86_stdcallcc i32 @parse_backslash(i8** inreg %word, i32* inreg %word_length, i32* inreg %max_length) nounwind { +entry: + %tmp6 = load i8* null, align 1 ; <i8> [#uses=1] + br label %bb13 +bb13: ; preds = %entry + %tmp26 = call fastcc i8* @w_addchar( i8* null, i32* %word_length, i32* %max_length, i8 signext %tmp6 ) nounwind ; <i8*> [#uses=1] + store i8* %tmp26, i8** %word, align 4 + ret i32 0 +} |