diff options
Diffstat (limited to 'test/CodeGen/PowerPC/subtract_from_imm.ll')
| -rw-r--r-- | test/CodeGen/PowerPC/subtract_from_imm.ll | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/test/CodeGen/PowerPC/subtract_from_imm.ll b/test/CodeGen/PowerPC/subtract_from_imm.ll new file mode 100644 index 0000000000000..8fa07b671a3de --- /dev/null +++ b/test/CodeGen/PowerPC/subtract_from_imm.ll @@ -0,0 +1,41 @@ +; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu < %s | FileCheck %s +; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-linux-gnu < %s | FileCheck %s + +; Make sure that the subfic is generated iff possible + +define i64 @subtract_from_imm1(i64 %v) nounwind readnone { +entry: +; CHECK-LABEL: subtract_from_imm1 +; CHECK: subfic 3, 3, 32767 +; CHECK: blr + %sub = sub i64 32767, %v + ret i64 %sub +} + +define i64 @subtract_from_imm2(i64 %v) nounwind readnone { +entry: +; CHECK-LABEL: subtract_from_imm2 +; CHECK-NOT: subfic +; CHECK: blr + %sub = sub i64 32768, %v + ret i64 %sub +} + +define i64 @subtract_from_imm3(i64 %v) nounwind readnone { +entry: +; CHECK-LABEL: subtract_from_imm3 +; CHECK: subfic 3, 3, -32768 +; CHECK: blr + %sub = sub i64 -32768, %v + ret i64 %sub +} + +define i64 @subtract_from_imm4(i64 %v) nounwind readnone { +entry: +; CHECK-LABEL: subtract_from_imm4 +; CHECK-NOT: subfic +; CHECK: blr + %sub = sub i64 -32769, %v + ret i64 %sub +} + |