bitcast-phi-uselistorder.ll
1.03 KB
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -instcombine < %s | FileCheck %s
@Q = internal unnamed_addr global double 1.000000e+00, align 8
define double @test(i1 %c, i64* %p) {
; CHECK-LABEL: @test(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[C:%.*]], label [[IF:%.*]], label [[END:%.*]]
; CHECK: if:
; CHECK-NEXT: [[LOAD1:%.*]] = load double, double* @Q, align 8
; CHECK-NEXT: br label [[END]]
; CHECK: end:
; CHECK-NEXT: [[TMP0:%.*]] = phi double [ 0.000000e+00, [[ENTRY:%.*]] ], [ [[LOAD1]], [[IF]] ]
; CHECK-NEXT: [[TMP1:%.*]] = bitcast i64* [[P:%.*]] to double*
; CHECK-NEXT: store double [[TMP0]], double* [[TMP1]], align 8
; CHECK-NEXT: ret double [[TMP0]]
;
entry:
br i1 %c, label %if, label %end
if:
%load = load i64, i64* bitcast (double* @Q to i64*), align 8
br label %end
end:
%phi = phi i64 [ 0, %entry ], [ %load, %if ]
store i64 %phi, i64* %p, align 8
%cast = bitcast i64 %phi to double
ret double %cast
uselistorder i64 %phi, { 1, 0 }
}