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94 lines
3.2 KiB
LLVM
94 lines
3.2 KiB
LLVM
; RUN: opt -O3 -S < %s | FileCheck %s
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; XFAIL: *
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declare i32 @doo(...)
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; PR6627 - This whole nasty sequence should be flattened down to a single
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; 32-bit comparison.
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define void @test2(i8* %arrayidx) nounwind ssp {
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entry:
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%xx = bitcast i8* %arrayidx to i32*
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%x1 = load i32, i32* %xx, align 4
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%tmp = trunc i32 %x1 to i8
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%conv = zext i8 %tmp to i32
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%cmp = icmp eq i32 %conv, 127
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br i1 %cmp, label %land.lhs.true, label %if.end
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land.lhs.true: ; preds = %entry
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%arrayidx4 = getelementptr inbounds i8, i8* %arrayidx, i64 1
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%tmp5 = load i8, i8* %arrayidx4, align 1
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%conv6 = zext i8 %tmp5 to i32
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%cmp7 = icmp eq i32 %conv6, 69
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br i1 %cmp7, label %land.lhs.true9, label %if.end
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land.lhs.true9: ; preds = %land.lhs.true
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%arrayidx12 = getelementptr inbounds i8, i8* %arrayidx, i64 2
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%tmp13 = load i8, i8* %arrayidx12, align 1
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%conv14 = zext i8 %tmp13 to i32
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%cmp15 = icmp eq i32 %conv14, 76
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br i1 %cmp15, label %land.lhs.true17, label %if.end
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land.lhs.true17: ; preds = %land.lhs.true9
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%arrayidx20 = getelementptr inbounds i8, i8* %arrayidx, i64 3
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%tmp21 = load i8, i8* %arrayidx20, align 1
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%conv22 = zext i8 %tmp21 to i32
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%cmp23 = icmp eq i32 %conv22, 70
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br i1 %cmp23, label %if.then, label %if.end
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if.then: ; preds = %land.lhs.true17
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%call25 = call i32 (...) @doo()
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br label %if.end
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if.end:
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ret void
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; CHECK-LABEL: @test2(
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; CHECK: %x1 = load i32, i32* %xx, align 4
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; CHECK-NEXT: icmp eq i32 %x1, 1179403647
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; CHECK-NEXT: br i1 {{.*}}, label %if.then, label %if.end
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}
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; PR6627 - This should all be flattened down to one compare. This is the same
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; as test2, except that the initial load is done as an i8 instead of i32, thus
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; requiring widening.
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define void @test2a(i8* %arrayidx) nounwind ssp {
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entry:
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%x1 = load i8, i8* %arrayidx, align 4
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%conv = zext i8 %x1 to i32
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%cmp = icmp eq i32 %conv, 127
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br i1 %cmp, label %land.lhs.true, label %if.end
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land.lhs.true: ; preds = %entry
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%arrayidx4 = getelementptr inbounds i8, i8* %arrayidx, i64 1
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%tmp5 = load i8, i8* %arrayidx4, align 1
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%conv6 = zext i8 %tmp5 to i32
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%cmp7 = icmp eq i32 %conv6, 69
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br i1 %cmp7, label %land.lhs.true9, label %if.end
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land.lhs.true9: ; preds = %land.lhs.true
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%arrayidx12 = getelementptr inbounds i8, i8* %arrayidx, i64 2
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%tmp13 = load i8, i8* %arrayidx12, align 1
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%conv14 = zext i8 %tmp13 to i32
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%cmp15 = icmp eq i32 %conv14, 76
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br i1 %cmp15, label %land.lhs.true17, label %if.end
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land.lhs.true17: ; preds = %land.lhs.true9
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%arrayidx20 = getelementptr inbounds i8, i8* %arrayidx, i64 3
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%tmp21 = load i8, i8* %arrayidx20, align 1
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%conv22 = zext i8 %tmp21 to i32
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%cmp23 = icmp eq i32 %conv22, 70
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br i1 %cmp23, label %if.then, label %if.end
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if.then: ; preds = %land.lhs.true17
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%call25 = call i32 (...) @doo()
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br label %if.end
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if.end:
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ret void
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; CHECK-LABEL: @test2a(
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; CHECK: %x1 = load i32, i32* {{.*}}, align 4
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; CHECK-NEXT: icmp eq i32 %x1, 1179403647
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; CHECK-NEXT: br i1 {{.*}}, label %if.then, label %if.end
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}
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