forked from OSchip/llvm-project
488 lines
9.4 KiB
LLVM
488 lines
9.4 KiB
LLVM
; RUN: opt < %s -correlated-propagation -S | FileCheck %s
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; PR2581
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; CHECK-LABEL: @test1(
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define i32 @test1(i1 %C) nounwind {
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br i1 %C, label %exit, label %body
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body: ; preds = %0
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; CHECK-NOT: select
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%A = select i1 %C, i32 10, i32 11 ; <i32> [#uses=1]
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; CHECK: ret i32 11
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ret i32 %A
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exit: ; preds = %0
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; CHECK: ret i32 10
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ret i32 10
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}
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; PR4420
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declare i1 @ext()
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; CHECK-LABEL: @test2(
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define i1 @test2() {
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entry:
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%cond = tail call i1 @ext() ; <i1> [#uses=2]
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br i1 %cond, label %bb1, label %bb2
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bb1: ; preds = %entry
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%cond2 = tail call i1 @ext() ; <i1> [#uses=1]
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br i1 %cond2, label %bb3, label %bb2
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bb2: ; preds = %bb1, %entry
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; CHECK-NOT: phi i1
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%cond_merge = phi i1 [ %cond, %entry ], [ false, %bb1 ] ; <i1> [#uses=1]
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; CHECK: ret i1 false
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ret i1 %cond_merge
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bb3: ; preds = %bb1
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%res = tail call i1 @ext() ; <i1> [#uses=1]
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; CHECK: ret i1 %res
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ret i1 %res
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}
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; PR4855
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@gv = internal constant i8 7
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; CHECK-LABEL: @test3(
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define i8 @test3(i8* %a) nounwind {
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entry:
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%cond = icmp eq i8* %a, @gv
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br i1 %cond, label %bb2, label %bb
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bb: ; preds = %entry
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ret i8 0
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bb2: ; preds = %entry
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; CHECK: %should_be_const = load i8, i8* @gv
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%should_be_const = load i8, i8* %a
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ret i8 %should_be_const
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}
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; PR1757
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; CHECK-LABEL: @test4(
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define i32 @test4(i32) {
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EntryBlock:
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; CHECK: icmp sgt i32 %0, 2
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%.demorgan = icmp sgt i32 %0, 2
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br i1 %.demorgan, label %GreaterThanTwo, label %LessThanOrEqualToTwo
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GreaterThanTwo:
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; CHECK-NOT: icmp eq i32 %0, 2
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icmp eq i32 %0, 2
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; CHECK: br i1 false
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br i1 %1, label %Impossible, label %NotTwoAndGreaterThanTwo
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NotTwoAndGreaterThanTwo:
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ret i32 2
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Impossible:
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ret i32 1
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LessThanOrEqualToTwo:
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ret i32 0
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}
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declare i32* @f(i32*)
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define void @test5(i32* %x, i32* %y) {
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; CHECK-LABEL: @test5(
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entry:
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%pre = icmp eq i32* %x, null
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br i1 %pre, label %return, label %loop
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loop:
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%phi = phi i32* [ %sel, %loop ], [ %x, %entry ]
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; CHECK: %phi = phi i32* [ %f, %loop ], [ %x, %entry ]
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%f = tail call i32* @f(i32* %phi)
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%cmp1 = icmp ne i32* %f, %y
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%sel = select i1 %cmp1, i32* %f, i32* null
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%cmp2 = icmp eq i32* %sel, null
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br i1 %cmp2, label %return, label %loop
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return:
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ret void
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}
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define i32 @switch1(i32 %s) {
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; CHECK-LABEL: @switch1(
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entry:
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%cmp = icmp slt i32 %s, 0
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br i1 %cmp, label %negative, label %out
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negative:
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switch i32 %s, label %out [
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; CHECK: switch i32 %s, label %out
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i32 0, label %out
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; CHECK-NOT: i32 0
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i32 1, label %out
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; CHECK-NOT: i32 1
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i32 -1, label %next
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; CHECK: i32 -1, label %next
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i32 -2, label %next
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; CHECK: i32 -2, label %next
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i32 2, label %out
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; CHECK-NOT: i32 2
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i32 3, label %out
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; CHECK-NOT: i32 3
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]
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out:
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%p = phi i32 [ 1, %entry ], [ -1, %negative ], [ -1, %negative ], [ -1, %negative ], [ -1, %negative ], [ -1, %negative ]
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ret i32 %p
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next:
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%q = phi i32 [ 0, %negative ], [ 0, %negative ]
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ret i32 %q
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}
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define i32 @switch2(i32 %s) {
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; CHECK-LABEL: @switch2(
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entry:
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%cmp = icmp sgt i32 %s, 0
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br i1 %cmp, label %positive, label %out
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positive:
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switch i32 %s, label %out [
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i32 0, label %out
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i32 -1, label %next
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i32 -2, label %next
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]
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; CHECK: br label %out
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out:
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%p = phi i32 [ -1, %entry ], [ 1, %positive ], [ 1, %positive ]
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ret i32 %p
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next:
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%q = phi i32 [ 0, %positive ], [ 0, %positive ]
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ret i32 %q
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}
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define i32 @switch3(i32 %s) {
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; CHECK-LABEL: @switch3(
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entry:
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%cmp = icmp sgt i32 %s, 0
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br i1 %cmp, label %positive, label %out
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positive:
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switch i32 %s, label %out [
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i32 -1, label %out
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i32 -2, label %next
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i32 -3, label %next
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]
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; CHECK: br label %out
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out:
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%p = phi i32 [ -1, %entry ], [ 1, %positive ], [ 1, %positive ]
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ret i32 %p
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next:
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%q = phi i32 [ 0, %positive ], [ 0, %positive ]
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ret i32 %q
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}
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define void @switch4(i32 %s) {
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; CHECK-LABEL: @switch4(
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entry:
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%cmp = icmp eq i32 %s, 0
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br i1 %cmp, label %zero, label %out
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zero:
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switch i32 %s, label %out [
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i32 0, label %next
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i32 1, label %out
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i32 -1, label %out
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]
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; CHECK: br label %next
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out:
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ret void
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next:
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ret void
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}
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define i1 @arg_attribute(i8* nonnull %a) {
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; CHECK-LABEL: @arg_attribute(
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; CHECK: ret i1 false
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%cmp = icmp eq i8* %a, null
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br label %exit
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exit:
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ret i1 %cmp
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}
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declare nonnull i8* @return_nonnull()
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define i1 @call_attribute() {
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; CHECK-LABEL: @call_attribute(
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; CHECK: ret i1 false
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%a = call i8* @return_nonnull()
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%cmp = icmp eq i8* %a, null
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br label %exit
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exit:
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ret i1 %cmp
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}
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define i1 @umin(i32 %a, i32 %b) {
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; CHECK-LABEL: @umin(
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entry:
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%cmp = icmp ult i32 %a, 5
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br i1 %cmp, label %a_guard, label %out
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a_guard:
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%cmp2 = icmp ult i32 %b, 20
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br i1 %cmp2, label %b_guard, label %out
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b_guard:
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%sel_cmp = icmp ult i32 %a, %b
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%min = select i1 %sel_cmp, i32 %a, i32 %b
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%res = icmp eq i32 %min, 7
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br label %next
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next:
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; CHECK: next:
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; CHECK: ret i1 false
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ret i1 %res
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out:
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ret i1 false
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}
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define i1 @smin(i32 %a, i32 %b) {
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; CHECK-LABEL: @smin(
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entry:
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%cmp = icmp ult i32 %a, 5
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br i1 %cmp, label %a_guard, label %out
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a_guard:
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%cmp2 = icmp ult i32 %b, 20
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br i1 %cmp2, label %b_guard, label %out
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b_guard:
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%sel_cmp = icmp sle i32 %a, %b
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%min = select i1 %sel_cmp, i32 %a, i32 %b
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%res = icmp eq i32 %min, 7
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br label %next
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next:
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; CHECK: next:
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; CHECK: ret i1 false
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ret i1 %res
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out:
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ret i1 false
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}
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define i1 @smax(i32 %a, i32 %b) {
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; CHECK-LABEL: @smax(
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entry:
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%cmp = icmp sgt i32 %a, 5
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br i1 %cmp, label %a_guard, label %out
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a_guard:
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%cmp2 = icmp sgt i32 %b, 20
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br i1 %cmp2, label %b_guard, label %out
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b_guard:
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%sel_cmp = icmp sge i32 %a, %b
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%max = select i1 %sel_cmp, i32 %a, i32 %b
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%res = icmp eq i32 %max, 7
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br label %next
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next:
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; CHECK: next:
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; CHECK: ret i1 false
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ret i1 %res
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out:
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ret i1 false
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}
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define i1 @umax(i32 %a, i32 %b) {
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; CHECK-LABEL: @umax(
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entry:
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%cmp = icmp sgt i32 %a, 5
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br i1 %cmp, label %a_guard, label %out
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a_guard:
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%cmp2 = icmp sgt i32 %b, 20
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br i1 %cmp2, label %b_guard, label %out
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b_guard:
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%sel_cmp = icmp uge i32 %a, %b
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%max = select i1 %sel_cmp, i32 %a, i32 %b
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%res = icmp eq i32 %max, 7
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br label %next
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next:
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; CHECK: next:
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; CHECK: ret i1 false
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ret i1 %res
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out:
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ret i1 false
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}
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define i1 @clamp_low1(i32 %a) {
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; CHECK-LABEL: @clamp_low1(
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entry:
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%cmp = icmp sge i32 %a, 5
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br i1 %cmp, label %a_guard, label %out
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a_guard:
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%sel_cmp = icmp eq i32 %a, 5
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%add = add i32 %a, -1
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%sel = select i1 %sel_cmp, i32 5, i32 %a
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%res = icmp eq i32 %sel, 4
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br label %next
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next:
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; CHECK: next:
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; CHECK: ret i1 false
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ret i1 %res
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out:
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ret i1 false
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}
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define i1 @clamp_low2(i32 %a) {
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; CHECK-LABEL: @clamp_low2(
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entry:
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%cmp = icmp sge i32 %a, 5
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br i1 %cmp, label %a_guard, label %out
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a_guard:
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%sel_cmp = icmp ne i32 %a, 5
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%add = add i32 %a, -1
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%sel = select i1 %sel_cmp, i32 %a, i32 5
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%res = icmp eq i32 %sel, 4
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br label %next
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next:
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; CHECK: next:
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; CHECK: ret i1 false
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ret i1 %res
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out:
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ret i1 false
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}
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define i1 @clamp_high1(i32 %a) {
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; CHECK-LABEL: @clamp_high1(
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entry:
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%cmp = icmp sle i32 %a, 5
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br i1 %cmp, label %a_guard, label %out
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a_guard:
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%sel_cmp = icmp eq i32 %a, 5
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%add = add i32 %a, 1
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%sel = select i1 %sel_cmp, i32 5, i32 %a
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%res = icmp eq i32 %sel, 6
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br label %next
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next:
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; CHECK: next:
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; CHECK: ret i1 false
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ret i1 %res
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out:
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ret i1 false
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}
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define i1 @clamp_high2(i32 %a) {
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; CHECK-LABEL: @clamp_high2(
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entry:
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%cmp = icmp sle i32 %a, 5
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br i1 %cmp, label %a_guard, label %out
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a_guard:
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%sel_cmp = icmp ne i32 %a, 5
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%add = add i32 %a, 1
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%sel = select i1 %sel_cmp, i32 %a, i32 5
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%res = icmp eq i32 %sel, 6
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br label %next
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next:
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; CHECK: next:
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; CHECK: ret i1 false
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ret i1 %res
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out:
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ret i1 false
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}
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; Just showing arbitrary constants work, not really a clamp
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define i1 @clamp_high3(i32 %a) {
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; CHECK-LABEL: @clamp_high3(
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entry:
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%cmp = icmp sle i32 %a, 5
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br i1 %cmp, label %a_guard, label %out
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a_guard:
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%sel_cmp = icmp ne i32 %a, 5
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%add = add i32 %a, 100
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%sel = select i1 %sel_cmp, i32 %a, i32 5
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%res = icmp eq i32 %sel, 105
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br label %next
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next:
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; CHECK: next:
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; CHECK: ret i1 false
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ret i1 %res
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out:
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ret i1 false
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}
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define i1 @zext_unknown(i8 %a) {
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; CHECK-LABEL: @zext_unknown
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; CHECK: ret i1 true
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entry:
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%a32 = zext i8 %a to i32
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%cmp = icmp sle i32 %a32, 256
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br label %exit
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exit:
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ret i1 %cmp
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}
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define i1 @trunc_unknown(i32 %a) {
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; CHECK-LABEL: @trunc_unknown
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; CHECK: ret i1 true
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entry:
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%a8 = trunc i32 %a to i8
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%a32 = sext i8 %a8 to i32
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%cmp = icmp sle i32 %a32, 128
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br label %exit
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exit:
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ret i1 %cmp
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}
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; TODO: missed optimization
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; Make sure we exercise non-integer inputs to unary operators (i.e. crash
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; check).
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define i1 @bitcast_unknown(float %a) {
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; CHECK-LABEL: @bitcast_unknown
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; CHECK: ret i1 %cmp
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entry:
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%a32 = bitcast float %a to i32
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%cmp = icmp sle i32 %a32, 128
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br label %exit
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exit:
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ret i1 %cmp
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}
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define i1 @bitcast_unknown2(i8* %p) {
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; CHECK-LABEL: @bitcast_unknown2
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; CHECK: ret i1 %cmp
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entry:
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%p64 = ptrtoint i8* %p to i64
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%cmp = icmp sle i64 %p64, 128
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br label %exit
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exit:
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ret i1 %cmp
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}
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define i1 @and_unknown(i32 %a) {
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; CHECK-LABEL: @and_unknown
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; CHECK: ret i1 true
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entry:
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%and = and i32 %a, 128
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%cmp = icmp sle i32 %and, 128
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br label %exit
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exit:
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ret i1 %cmp
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}
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define i1 @lshr_unknown(i32 %a) {
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; CHECK-LABEL: @lshr_unknown
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; CHECK: ret i1 true
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entry:
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%and = lshr i32 %a, 30
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%cmp = icmp sle i32 %and, 128
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br label %exit
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exit:
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ret i1 %cmp
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}
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