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| author | Evan Cheng <evan.cheng@apple.com> | 2008-09-20 01:28:05 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2008-09-20 01:28:05 +0000 |
| commit | 5e8d9def77b4a68e6be32f21cda28d2a451267a9 (patch) | |
| tree | e4c5bff945b84a35c2bb29268428066b37410340 /test | |
| parent | 4070e60efecb521e1badfbc0fd78840a62ce8450 (diff) | |
| download | llvm-5e8d9def77b4a68e6be32f21cda28d2a451267a9.tar.gz llvm-5e8d9def77b4a68e6be32f21cda28d2a451267a9.tar.bz2 llvm-5e8d9def77b4a68e6be32f21cda28d2a451267a9.tar.xz | |
Fix PR2808. When regalloc runs out of register, it spill a physical register around the live interval being allocated. Do not continue to try to spill another register, just grab the physical register and move on.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56381 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/X86/2008-09-19-RegAllocBug.ll | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/test/CodeGen/X86/2008-09-19-RegAllocBug.ll b/test/CodeGen/X86/2008-09-19-RegAllocBug.ll new file mode 100644 index 0000000000..47feb83c92 --- /dev/null +++ b/test/CodeGen/X86/2008-09-19-RegAllocBug.ll @@ -0,0 +1,22 @@ +; RUN: llvm-as < %s | llc -mtriple=i386-apple-darwin +; PR2808 + +@g_3 = external global i32 ; <i32*> [#uses=1] + +define i32 @func_4() nounwind { +entry: + %0 = load i32* @g_3, align 4 ; <i32> [#uses=2] + %1 = trunc i32 %0 to i8 ; <i8> [#uses=1] + %2 = sub i8 1, %1 ; <i8> [#uses=1] + %3 = sext i8 %2 to i32 ; <i32> [#uses=1] + %.0 = ashr i32 %3, select (i1 icmp ne (i8 zext (i1 icmp ugt (i32 ptrtoint (i32 ()* @func_4 to i32), i32 3) to i8), i8 0), i32 0, i32 ptrtoint (i32 ()* @func_4 to i32)) ; <i32> [#uses=1] + %4 = urem i32 %0, %.0 ; <i32> [#uses=1] + %5 = icmp eq i32 %4, 0 ; <i1> [#uses=1] + br i1 %5, label %return, label %bb4 + +bb4: ; preds = %entry + ret i32 undef + +return: ; preds = %entry + ret i32 undef +} |