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