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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S %s | FileCheck %s
; Make sure we don't speculate loads under ThreadSanitizer.
@g = global i32 0, align 4
define i32 @TestNoTsan(i32 %cond) nounwind readonly uwtable {
; CHECK-LABEL: @TestNoTsan(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i32 [[COND:%.*]], 0
; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr @g, align 4
; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 [[TOBOOL]], i32 0, i32 [[TMP0]]
; CHECK-NEXT: ret i32 [[SPEC_SELECT]]
;
entry:
%tobool = icmp eq i32 %cond, 0
br i1 %tobool, label %return, label %if.then
if.then: ; preds = %entry
%0 = load i32, ptr @g, align 4
br label %return
return: ; preds = %entry, %if.then
%retval = phi i32 [ %0, %if.then ], [ 0, %entry ]
ret i32 %retval
}
define i32 @TestTsan(i32 %cond) nounwind readonly uwtable sanitize_thread {
; CHECK-LABEL: @TestTsan(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i32 [[COND:%.*]], 0
; CHECK-NEXT: br i1 [[TOBOOL]], label [[RETURN:%.*]], label [[IF_THEN:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr @g, align 4
; CHECK-NEXT: br label [[RETURN]]
; CHECK: return:
; CHECK-NEXT: [[RETVAL:%.*]] = phi i32 [ [[TMP0]], [[IF_THEN]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: ret i32 [[RETVAL]]
;
entry:
%tobool = icmp eq i32 %cond, 0
br i1 %tobool, label %return, label %if.then
if.then: ; preds = %entry
%0 = load i32, ptr @g, align 4
br label %return
return: ; preds = %entry, %if.then
%retval = phi i32 [ %0, %if.then ], [ 0, %entry ]
ret i32 %retval
}
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