phi-with-duplicate-pred.ll
1.77 KB
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -sroa -S | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-n8:16:32:64"
@a = external global i16, align 1
define void @f2() {
; CHECK-LABEL: @f2(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 undef, label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; CHECK: if.then:
; CHECK-NEXT: br label [[CLEANUP:%.*]]
; CHECK: cleanup:
; CHECK-NEXT: [[G_0_SROA_SPECULATE_LOAD_CLEANUP:%.*]] = load i16, i16* @a, align 1
; CHECK-NEXT: switch i32 2, label [[CLEANUP7:%.*]] [
; CHECK-NEXT: i32 0, label [[LBL1:%.*]]
; CHECK-NEXT: i32 2, label [[LBL1]]
; CHECK-NEXT: ]
; CHECK: if.else:
; CHECK-NEXT: br label [[LBL1]]
; CHECK: lbl1:
; CHECK-NEXT: [[G_0_SROA_SPECULATED:%.*]] = phi i16 [ [[G_0_SROA_SPECULATE_LOAD_CLEANUP]], [[CLEANUP]] ], [ [[G_0_SROA_SPECULATE_LOAD_CLEANUP]], [[CLEANUP]] ], [ undef, [[IF_ELSE]] ]
; CHECK-NEXT: unreachable
; CHECK: cleanup7:
; CHECK-NEXT: ret void
;
entry:
%e = alloca i16, align 1
br i1 undef, label %if.then, label %if.else
if.then: ; preds = %entry
br label %cleanup
cleanup: ; preds = %if.then
switch i32 2, label %cleanup7 [
i32 0, label %lbl1
i32 2, label %lbl1
]
if.else: ; preds = %entry
br label %lbl1
lbl1: ; preds = %if.else, %cleanup, %cleanup
%g.0 = phi i16* [ @a, %cleanup ], [ @a, %cleanup ], [ %e, %if.else ]
%0 = load i16, i16* %g.0, align 1
unreachable
cleanup7: ; preds = %cleanup
ret void
}