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; RUN: opt -simplifycfg -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 {
entry:
%tobool = icmp eq i32 %cond, 0
br i1 %tobool, label %return, label %if.then
if.then: ; preds = %entry
%0 = load i32* @g, align 4
br label %return
return: ; preds = %entry, %if.then
%retval = phi i32 [ %0, %if.then ], [ 0, %entry ]
ret i32 %retval
; CHECK-LABEL: @TestNoTsan
; CHECK: %[[LOAD:[^ ]*]] = load
; CHECK: select{{.*}}[[LOAD]]
; CHECK: ret i32
}
define i32 @TestTsan(i32 %cond) nounwind readonly uwtable sanitize_thread {
entry:
%tobool = icmp eq i32 %cond, 0
br i1 %tobool, label %return, label %if.then
if.then: ; preds = %entry
%0 = load i32* @g, align 4
br label %return
return: ; preds = %entry, %if.then
%retval = phi i32 [ %0, %if.then ], [ 0, %entry ]
ret i32 %retval
; CHECK-LABEL: @TestTsan
; CHECK: br i1
; CHECK: load i32* @g
; CHECK: br label
; CHECK: ret i32
}
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