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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -S -passes=mem2reg < %s | FileCheck %s
define i8 @single_store_literal_poison(i1 %cond) {
; CHECK-LABEL: define i8 @single_store_literal_poison(
; CHECK-SAME: i1 [[COND:%.*]]) {
; CHECK-NEXT: br i1 [[COND]], label %[[IF:.*]], label %[[EXIT:.*]]
; CHECK: [[IF]]:
; CHECK-NEXT: br label %[[EXIT]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: ret i8 undef
;
%a = alloca i8, align 1
br i1 %cond, label %if, label %exit
if:
store i8 poison, ptr %a, align 1
br label %exit
exit:
%v = load i8, ptr %a, align 1
ret i8 %v
}
; FIXME: This is a miscompile.
define i8 @single_store_maybe_poison(i1 %cond, i8 %x) {
; CHECK-LABEL: define i8 @single_store_maybe_poison(
; CHECK-SAME: i1 [[COND:%.*]], i8 [[X:%.*]]) {
; CHECK-NEXT: br i1 [[COND]], label %[[IF:.*]], label %[[EXIT:.*]]
; CHECK: [[IF]]:
; CHECK-NEXT: br label %[[EXIT]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: [[A_0:%.*]] = phi i8 [ [[X]], %[[IF]] ], [ undef, [[TMP0:%.*]] ]
; CHECK-NEXT: ret i8 [[A_0]]
;
%a = alloca i8, align 1
br i1 %cond, label %if, label %exit
if:
store i8 %x, ptr %a, align 1
br label %exit
exit:
%v = load i8, ptr %a, align 1
ret i8 %v
}
define i8 @single_store_cant_be_poison(i1 %cond, i8 noundef %x) {
; CHECK-LABEL: define i8 @single_store_cant_be_poison(
; CHECK-SAME: i1 [[COND:%.*]], i8 noundef [[X:%.*]]) {
; CHECK-NEXT: br i1 [[COND]], label %[[IF:.*]], label %[[EXIT:.*]]
; CHECK: [[IF]]:
; CHECK-NEXT: br label %[[EXIT]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: ret i8 [[X]]
;
%a = alloca i8, align 1
br i1 %cond, label %if, label %exit
if:
store i8 %x, ptr %a, align 1
br label %exit
exit:
%v = load i8, ptr %a, align 1
ret i8 %v
}
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