forked from OSchip/llvm-project
144 lines
3.6 KiB
LLVM
144 lines
3.6 KiB
LLVM
; RUN: opt < %s -ipsccp -S | FileCheck %s
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; Constant range for %a is [1, 48) and for %b is [301, 1000)
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; CHECK-LABEL: f1
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; CHECK-NOT: icmp
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; CHECK: %a.1 = select i1 false, i32 1, i32 2
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; CHECK: %b.1 = select i1 true, i32 1, i32 2
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; CHECK: %a.2 = select i1 false, i32 1, i32 2
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; CHECK: %b.2 = select i1 true, i32 1, i32 2
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define internal i32 @f1(i32 %a, i32 %b) {
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entry:
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%cmp.a = icmp sgt i32 %a, 300
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%cmp.b = icmp sgt i32 %b, 300
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%cmp.a2 = icmp ugt i32 %a, 300
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%cmp.b2 = icmp ugt i32 %b, 300
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%a.1 = select i1 %cmp.a, i32 1, i32 2
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%b.1 = select i1 %cmp.b, i32 1, i32 2
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%a.2 = select i1 %cmp.a2, i32 1, i32 2
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%b.2 = select i1 %cmp.b2, i32 1, i32 2
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%res1 = add i32 %a.1, %b.1
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%res2 = add i32 %a.2, %b.2
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%res3 = add i32 %res1, %res2
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ret i32 %res3
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}
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; Constant range for %x is [47, 302)
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; CHECK-LABEL: f2
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; CHECK: %cmp = icmp sgt i32 %x, 300
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; CHECK: %res1 = select i1 %cmp, i32 1, i32 2
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; CHECK-NEXT: %res2 = select i1 true, i32 3, i32 4
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; CHECK-NEXT: %res3 = select i1 true, i32 5, i32 6
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; CHECK-NEXT: %res4 = select i1 %cmp4, i32 3, i32 4
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; CHECK-NEXT: %res5 = select i1 true, i32 5, i32 6
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define internal i32 @f2(i32 %x) {
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entry:
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%cmp = icmp sgt i32 %x, 300
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%cmp2 = icmp ne i32 %x, 10
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%cmp3 = icmp sge i32 %x, 47
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%cmp4 = icmp ugt i32 %x, 300
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%cmp5 = icmp uge i32 %x, 47
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%res1 = select i1 %cmp, i32 1, i32 2
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%res2 = select i1 %cmp2, i32 3, i32 4
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%res3 = select i1 %cmp3, i32 5, i32 6
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%res4 = select i1 %cmp4, i32 3, i32 4
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%res5 = select i1 %cmp5, i32 5, i32 6
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%res6 = add i32 %res1, %res2
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%res7 = add i32 %res3, %res4
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%res = add i32 %res6, %res5
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ret i32 %res
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}
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define i32 @caller1() {
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entry:
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%call1 = tail call i32 @f1(i32 1, i32 301)
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%call2 = tail call i32 @f1(i32 47, i32 999)
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%call3 = tail call i32 @f2(i32 47)
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%call4 = tail call i32 @f2(i32 301)
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%res = add nsw i32 %call1, %call2
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%res.1 = add nsw i32 %res, %call3
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%res.2 = add nsw i32 %res.1, %call4
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ret i32 %res.2
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}
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; x is overdefined, because constant ranges are only used for parameter
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; values.
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; CHECK-LABEL: f3
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; CHECK: %cmp = icmp sgt i32 %x, 300
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; CHECK: %res = select i1 %cmp, i32 1, i32 2
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; CHECK: ret i32 %res
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define internal i32 @f3(i32 %x) {
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entry:
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%cmp = icmp sgt i32 %x, 300
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%res = select i1 %cmp, i32 1, i32 2
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ret i32 %res
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}
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; The phi node could be converted in a ConstantRange.
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define i32 @caller2(i1 %cmp) {
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entry:
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br i1 %cmp, label %if.true, label %end
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if.true:
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br label %end
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end:
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%res = phi i32 [ 0, %entry], [ 1, %if.true ]
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%call1 = tail call i32 @f3(i32 %res)
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ret i32 %call1
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}
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; CHECK-LABEL: f4
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; CHECK: %cmp = icmp sgt i32 %x, 300
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; CHECK: %res = select i1 %cmp, i32 1, i32 2
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; CHECK: ret i32 %res
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define internal i32 @f4(i32 %x) {
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entry:
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%cmp = icmp sgt i32 %x, 300
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%res = select i1 %cmp, i32 1, i32 2
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ret i32 %res
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}
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; ICmp could introduce bounds on ConstantRanges.
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define i32 @caller3(i32 %x) {
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entry:
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%cmp = icmp sgt i32 %x, 300
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br i1 %cmp, label %if.true, label %end
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if.true:
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%x.1 = tail call i32 @f4(i32 %x)
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br label %end
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end:
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%res = phi i32 [ 0, %entry], [ %x.1, %if.true ]
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ret i32 %res
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}
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; Check to make sure we do not attempt to access lattice values in unreachable
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; blocks.
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define i32 @test_unreachable() {
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entry:
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call i1 @test_unreachable_callee(i32 1)
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call i1 @test_unreachable_callee(i32 2)
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ret i32 1
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}
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define internal i1 @test_unreachable_callee(i32 %a) {
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entry:
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ret i1 true
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unreachablebb:
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%cmp = icmp eq i32 undef, %a
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unreachable
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}
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; Check that we do not attempt to get range info for non-integer types and
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; crash.
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define double @test_struct({ double, double } %test) {
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%v = extractvalue { double, double } %test, 0
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%r = fmul double %v, %v
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ret double %r
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}
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