| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -newgvn %s -S -o - | FileCheck %s |
| define hidden void @foo() { |
| ; CHECK-LABEL: @foo( |
| ; CHECK-NEXT: top: |
| ; CHECK-NEXT: br label [[IF:%.*]] |
| ; CHECK: if: |
| ; CHECK-NEXT: [[TMP0:%.*]] = phi double [ [[TMP1:%.*]], [[IF]] ], [ undef, [[TOP:%.*]] ] |
| ; CHECK-NEXT: [[TMP1]] = fadd double [[TMP0]], 1.000000e+00 |
| ; CHECK-NEXT: br i1 false, label [[L50:%.*]], label [[IF]] |
| ; CHECK: L50: |
| ; CHECK-NEXT: store i8 undef, i8* null |
| ; CHECK-NEXT: ret void |
| ; |
| top: |
| %.promoted = load double, double* undef, align 8 |
| br label %if |
| |
| ;; This is really a multi-valued phi, because the phi is defined by an expression of the phi. |
| ;; This means that we can't propagate the value over the backedge, because we'll just cycle |
| ;; through every value. |
| |
| if: ; preds = %if, %top |
| %0 = phi double [ %1, %if ], [ %.promoted, %top ] |
| %1 = fadd double %0, 1.0 |
| br i1 false, label %L50, label %if |
| |
| L50: ; preds = %if |
| %.lcssa = phi double [ %1, %if ] |
| store double %.lcssa, double* undef, align 8 |
| ret void |
| } |
| |
