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; RUN: opt -passes=correlated-propagation -S < %s | FileCheck %s
declare void @llvm.experimental.guard(i1,...)
define i1 @test1(i32 %a) {
; CHECK-LABEL: @test1(
; CHECK: %alive = icmp eq i32 %a, 8
; CHECK-NEXT: %result = or i1 false, %alive
%cmp = icmp ult i32 %a, 16
call void(i1,...) @llvm.experimental.guard(i1 %cmp) [ "deopt"() ]
%dead = icmp eq i32 %a, 16
%alive = icmp eq i32 %a, 8
%result = or i1 %dead, %alive
ret i1 %result
}
define i1 @test2(i32 %a) {
; CHECK-LABEL: @test2(
; CHECK: continue:
; CHECK-NEXT: %alive = icmp eq i32 %a, 8
; CHECK-NEXT: %result = or i1 false, %alive
%cmp = icmp ult i32 %a, 16
call void(i1,...) @llvm.experimental.guard(i1 %cmp) [ "deopt"() ]
br label %continue
continue:
%dead = icmp eq i32 %a, 16
%alive = icmp eq i32 %a, 8
%result = or i1 %dead, %alive
ret i1 %result
}
define i1 @test3(i32 %a, i1 %flag) {
; CHECK-LABEL: @test3(
; CHECK: continue:
; CHECK-NEXT: %alive.1 = icmp eq i32 %a, 16
; CHECK-NEXT: %alive.2 = icmp eq i32 %a, 8
; CHECK-NEXT: %result = or i1 %alive.1, %alive.2
br i1 %flag, label %true, label %false
true:
%cmp = icmp ult i32 %a, 16
call void(i1,...) @llvm.experimental.guard(i1 %cmp) [ "deopt"() ]
br label %continue
false:
br label %continue
continue:
%alive.1 = icmp eq i32 %a, 16
%alive.2 = icmp eq i32 %a, 8
%result = or i1 %alive.1, %alive.2
ret i1 %result
}
define i1 @test4(i32 %a, i1 %flag) {
; CHECK-LABEL: @test4(
; CHECK: continue:
; CHECK-NEXT: %alive = icmp eq i32 %a, 12
; CHECK-NEXT: %result = or i1 false, %alive
br i1 %flag, label %true, label %false
true:
%cmp.t = icmp ult i32 %a, 16
call void(i1,...) @llvm.experimental.guard(i1 %cmp.t) [ "deopt"() ]
br label %continue
false:
%cmp.f = icmp ult i32 %a, 12
call void(i1,...) @llvm.experimental.guard(i1 %cmp.f) [ "deopt"() ]
br label %continue
continue:
%dead = icmp eq i32 %a, 16
%alive = icmp eq i32 %a, 12
%result = or i1 %dead, %alive
ret i1 %result
}
define i1 @test5(i32 %a) {
; CHECK-LABEL: @test5(
; CHECK: continue:
; CHECK-NEXT: %alive = icmp eq i32 %a.plus.8, 16
; CHECK-NEXT: %result = or i1 false, %alive
%cmp = icmp ult i32 %a, 16
call void(i1,...) @llvm.experimental.guard(i1 %cmp) [ "deopt"() ]
%a.plus.8 = add i32 %a, 8
br label %continue
continue:
%dead = icmp eq i32 %a.plus.8, 24
%alive = icmp eq i32 %a.plus.8, 16
%result = or i1 %dead, %alive
ret i1 %result
}
; Check that we handle the case when the guard is the very first instruction in
; a basic block.
define i1 @test6(i32 %a) {
; CHECK-LABEL: @test6(
; CHECK: %alive = icmp eq i32 %a, 8
; CHECK-NEXT: %result = or i1 false, %alive
%cmp = icmp ult i32 %a, 16
br label %continue
continue:
call void(i1,...) @llvm.experimental.guard(i1 %cmp) [ "deopt"() ]
%dead = icmp eq i32 %a, 16
%alive = icmp eq i32 %a, 8
%result = or i1 %dead, %alive
ret i1 %result
}
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