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| ; 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
}
|