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|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -S -passes=instsimplify < %s | FileCheck %s
; Test `%r` can be replaced by `%nonpoison`.
define i32 @other_noundef(i32 noundef %arg) {
; CHECK-LABEL: define i32 @other_noundef(
; CHECK-SAME: i32 noundef [[ARG:%.*]]) {
; CHECK-NEXT: [[START:.*]]:
; CHECK-NEXT: br label %[[LOOP:.*]]
; CHECK: [[LOOP]]:
; CHECK-NEXT: [[NONPOISON:%.*]] = phi i32 [ 0, %[[START]] ], [ [[NONPOISON]], %[[BB0:.*]] ], [ [[ARG]], %[[BB1:.*]] ]
; CHECK-NEXT: [[I:%.*]] = call i32 @opaque()
; CHECK-NEXT: switch i32 [[I]], label %[[EXIT:.*]] [
; CHECK-NEXT: i32 0, label %[[BB0]]
; CHECK-NEXT: i32 1, label %[[BB1]]
; CHECK-NEXT: ]
; CHECK: [[EXIT]]:
; CHECK-NEXT: ret i32 [[NONPOISON]]
; CHECK: [[BB0]]:
; CHECK-NEXT: br label %[[LOOP]]
; CHECK: [[BB1]]:
; CHECK-NEXT: br label %[[LOOP]]
;
start:
br label %loop
loop:
%nonpoison = phi i32 [ 0, %start ], [ %nonpoison, %bb0 ], [ %arg, %bb1 ]
%i = call i32 @opaque()
switch i32 %i, label %exit [
i32 0, label %bb0
i32 1, label %bb1
]
exit:
%r = freeze i32 %nonpoison
ret i32 %r
bb0:
br label %loop
bb1:
br label %loop
}
define i32 @other_poison(i32 %arg) {
; CHECK-LABEL: define i32 @other_poison(
; CHECK-SAME: i32 [[ARG:%.*]]) {
; CHECK-NEXT: [[START:.*]]:
; CHECK-NEXT: br label %[[LOOP:.*]]
; CHECK: [[LOOP]]:
; CHECK-NEXT: [[MAYPOISON:%.*]] = phi i32 [ 0, %[[START]] ], [ [[MAYPOISON]], %[[BB0:.*]] ], [ [[ARG]], %[[BB1:.*]] ]
; CHECK-NEXT: [[I:%.*]] = call i32 @opaque()
; CHECK-NEXT: switch i32 [[I]], label %[[EXIT:.*]] [
; CHECK-NEXT: i32 0, label %[[BB0]]
; CHECK-NEXT: i32 1, label %[[BB1]]
; CHECK-NEXT: ]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[R:%.*]] = freeze i32 [[MAYPOISON]]
; CHECK-NEXT: ret i32 [[R]]
; CHECK: [[BB0]]:
; CHECK-NEXT: br label %[[LOOP]]
; CHECK: [[BB1]]:
; CHECK-NEXT: br label %[[LOOP]]
;
start:
br label %loop
loop:
%maypoison = phi i32 [ 0, %start ], [ %maypoison, %bb0 ], [ %arg, %bb1 ]
%i = call i32 @opaque()
switch i32 %i, label %exit [
i32 0, label %bb0
i32 1, label %bb1
]
exit:
%r = freeze i32 %maypoison
ret i32 %r
bb0:
br label %loop
bb1:
br label %loop
}
declare i32 @opaque()
|
