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| author | Nate Begeman <natebegeman@mac.com> | 2004-11-04 19:43:18 +0000 |
|---|---|---|
| committer | Nate Begeman <natebegeman@mac.com> | 2004-11-04 19:43:18 +0000 |
| commit | 28dd2fc240749d77d4251b4a29b8cace2a65460c (patch) | |
| tree | b750a669e78abd4029bb60ff0919613283bafb2b | |
| parent | 3c7d7ee76136bf0041693fc939e155f34a197b2b (diff) | |
| download | llvm-28dd2fc240749d77d4251b4a29b8cace2a65460c.tar.gz llvm-28dd2fc240749d77d4251b4a29b8cace2a65460c.tar.bz2 llvm-28dd2fc240749d77d4251b4a29b8cace2a65460c.tar.xz | |
Thanks to sabre for pointing out that we were incorrectly codegen'ing
int test(int x) { return 32768 - x; }
Fixed by teaching the function that checks a constant's validity to be used
as an immediate argument about subtract-from instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17476 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/PowerPC/PPC32ISelSimple.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/Target/PowerPC/PPC32ISelSimple.cpp b/lib/Target/PowerPC/PPC32ISelSimple.cpp index d0406c7e40..5314dada04 100644 --- a/lib/Target/PowerPC/PPC32ISelSimple.cpp +++ b/lib/Target/PowerPC/PPC32ISelSimple.cpp @@ -536,8 +536,11 @@ bool PPC32ISel::canUseAsImmediateForOpcode(ConstantInt *CI, unsigned Opcode, else return false; } + + // Treat subfic like addi for the purposes of constant validation + if (Opcode == 5) Opcode = 0; - // ADDI, Compare, and non-indexed Load take SIMM + // addi, subfic, compare, and non-indexed load take SIMM bool cond1 = (Opcode < 2) && ((int32_t)CI->getRawValue() <= 32767) && ((int32_t)CI->getRawValue() >= -32768); |