| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -passes=instsimplify -S | FileCheck %s |
| |
| define float @fdiv_constant_fold() { |
| ; CHECK-LABEL: @fdiv_constant_fold( |
| ; CHECK-NEXT: ret float 1.500000e+00 |
| ; |
| %f = fdiv float 3.0, 2.0 |
| ret float %f |
| } |
| |
| define float @frem_constant_fold() { |
| ; CHECK-LABEL: @frem_constant_fold( |
| ; CHECK-NEXT: ret float 1.000000e+00 |
| ; |
| %f = frem float 3.0, 2.0 |
| ret float %f |
| } |
| |
| define double @fmul_fdiv_common_operand(double %x, double %y) { |
| ; CHECK-LABEL: @fmul_fdiv_common_operand( |
| ; CHECK-NEXT: ret double [[X:%.*]] |
| ; |
| %m = fmul double %x, %y |
| %d = fdiv reassoc nnan double %m, %y |
| ret double %d |
| } |
| |
| ; Negative test - the fdiv must be reassociative and not allow NaNs. |
| |
| define double @fmul_fdiv_common_operand_too_strict(double %x, double %y) { |
| ; CHECK-LABEL: @fmul_fdiv_common_operand_too_strict( |
| ; CHECK-NEXT: [[M:%.*]] = fmul fast double [[X:%.*]], [[Y:%.*]] |
| ; CHECK-NEXT: [[D:%.*]] = fdiv reassoc double [[M]], [[Y]] |
| ; CHECK-NEXT: ret double [[D]] |
| ; |
| %m = fmul fast double %x, %y |
| %d = fdiv reassoc double %m, %y |
| ret double %d |
| } |
| |
| ; Commute the fmul operands. Use a vector type to verify that works too. |
| |
| define <2 x float> @fmul_fdiv_common_operand_commute_vec(<2 x float> %x, <2 x float> %y) { |
| ; CHECK-LABEL: @fmul_fdiv_common_operand_commute_vec( |
| ; CHECK-NEXT: ret <2 x float> [[X:%.*]] |
| ; |
| %m = fmul <2 x float> %y, %x |
| %d = fdiv fast <2 x float> %m, %y |
| ret <2 x float> %d |
| } |
| |
| ; The constant expression version of this used to crash llvm-as. |
| define <2 x i1> @pr6096() { |
| ; CHECK-LABEL: @pr6096( |
| ; CHECK-NEXT: ret <2 x i1> zeroinitializer |
| ; |
| %fdiv = fdiv <2 x float> undef, <float 1.000000e+00, float 1.000000e+00> |
| %fcmp = fcmp ole <2 x float> %fdiv, zeroinitializer |
| ret <2 x i1> %fcmp |
| } |