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| author | Daniel Sanders <daniel.sanders@imgtec.com> | 2013-11-18 13:12:43 +0000 |
|---|---|---|
| committer | Daniel Sanders <daniel.sanders@imgtec.com> | 2013-11-18 13:12:43 +0000 |
| commit | 23427207ea575f57b571cf5aad1effb1f97e7ee1 (patch) | |
| tree | c56200f4de80bf563f3e437966407ad29acc45e6 /test/CodeGen/Mips | |
| parent | 26651c7a6602626cf13ff3cda13f3ec2401bf790 (diff) | |
| download | llvm-23427207ea575f57b571cf5aad1effb1f97e7ee1.tar.gz llvm-23427207ea575f57b571cf5aad1effb1f97e7ee1.tar.bz2 llvm-23427207ea575f57b571cf5aad1effb1f97e7ee1.tar.xz | |
[mips] Fix 'ran out of registers' in MIPS32 with FP64 when generating code for (ConstantFP 0.0)
Fixed an inappropriate use of BuildPairF64 when compiling for MIPS32 with FP64
which resulted in an impossible constraint on the register allocation. It now
uses BuildPairF64_64.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195007 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/Mips')
| -rw-r--r-- | test/CodeGen/Mips/2013-11-18-fp64-const0.ll | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/test/CodeGen/Mips/2013-11-18-fp64-const0.ll b/test/CodeGen/Mips/2013-11-18-fp64-const0.ll new file mode 100644 index 0000000000..f8390d9a1c --- /dev/null +++ b/test/CodeGen/Mips/2013-11-18-fp64-const0.ll @@ -0,0 +1,31 @@ +; RUN: llc -march=mips -mattr=-fp64 < %s | FileCheck -check-prefix=CHECK-FP32 %s +; RUN: llc -march=mips -mattr=+fp64 < %s | FileCheck -check-prefix=CHECK-FP64 %s + +; This test case is a simplified version of an llvm-stress generated test with +; seed=3718491962. +; It originally failed on MIPS32 with FP64 with the following error: +; LLVM ERROR: ran out of registers during register allocation +; This was caused by impossible register class restrictions caused by the use +; of BuildPairF64 instead of BuildPairF64_64. + +define void @autogen_SD3718491962() { +BB: + ; CHECK-FP32: mtc1 $zero, $f{{[0-3]*[02468]}} + ; CHECK-FP32: mtc1 $zero, $f{{[0-3]*[13579]}} + + ; CHECK-FP64: mtc1 $zero, $f{{[0-9]+}} + ; CHECK-FP64-NOT: mtc1 $zero, + ; FIXME: A redundant mthc1 is currently emitted. Add a -NOT when it is + ; eliminated + + %Cmp = fcmp ule double 0.000000e+00, undef + %Cmp11 = fcmp ueq double 0xFDBD965CF1BB7FDA, undef + br label %CF88 + +CF88: ; preds = %CF86 + %Sl18 = select i1 %Cmp, i1 %Cmp11, i1 %Cmp + br i1 %Sl18, label %CF88, label %CF85 + +CF85: ; preds = %CF88 + ret void +} |