diff options
Diffstat (limited to 'llvm/test/Transforms/Reassociate/absorption.ll')
| -rw-r--r-- | llvm/test/Transforms/Reassociate/absorption.ll | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/llvm/test/Transforms/Reassociate/absorption.ll b/llvm/test/Transforms/Reassociate/absorption.ll new file mode 100644 index 00000000000..744107c8424 --- /dev/null +++ b/llvm/test/Transforms/Reassociate/absorption.ll @@ -0,0 +1,27 @@ +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py +; RUN: opt -S -reassociate < %s | FileCheck %s + +; Check that if constants combine to an absorbing value then the expression is +; evaluated as the absorbing value. + +define i8 @or_all_ones(i8 %x) { +; CHECK-LABEL: @or_all_ones( +; CHECK-NEXT: ret i8 -1 +; + %tmp1 = or i8 %x, 127 + %tmp2 = or i8 %tmp1, 128 + ret i8 %tmp2 +} + +; TODO: fmul by 0.0 with nsz+nnan should have simplified to 0.0. + +define double @fmul_zero(double %x) { +; CHECK-LABEL: @fmul_zero( +; CHECK-NEXT: [[R:%.*]] = fmul fast double [[X:%.*]], 0.000000e+00 +; CHECK-NEXT: ret double [[R]] +; + %x4 = fmul fast double %x, 4.0 + %r = fmul fast double %x4, 0.0 + ret double %r +} + |
