derek.holloway
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38 lines
1.3 KiB
LLVM
38 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes=constraint-elimination -S %s | FileCheck %s
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target datalayout = "p:32:32:32"
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declare void @llvm.assume(i1)
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define i1 @gep_idx_implicit_truncate(ptr %dst, i64 %off) {
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; CHECK-LABEL: @gep_idx_implicit_truncate(
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; CHECK-NEXT: [[POS:%.*]] = icmp sge i64 [[OFF:%.*]], 0
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; CHECK-NEXT: call void @llvm.assume(i1 [[POS]])
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; CHECK-NEXT: [[GEP_OFF:%.*]] = getelementptr inbounds i8, ptr [[DST:%.*]], i64 [[OFF]]
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; CHECK-NEXT: ret i1 true
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;
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%pos = icmp sge i64 %off, 0
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call void @llvm.assume(i1 %pos)
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%gep.off = getelementptr inbounds i8, ptr %dst, i64 %off
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%cmp = icmp ule ptr %dst, %gep.off
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ret i1 %cmp
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}
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define i1 @gep_idx_explicit_truncate(ptr %dst, i64 %off) {
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; CHECK-LABEL: @gep_idx_explicit_truncate(
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; CHECK-NEXT: [[POS:%.*]] = icmp sge i64 [[OFF:%.*]], 0
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; CHECK-NEXT: call void @llvm.assume(i1 [[POS]])
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; CHECK-NEXT: [[T:%.*]] = trunc i64 [[OFF]] to i32
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; CHECK-NEXT: [[GEP_OFF:%.*]] = getelementptr inbounds i8, ptr [[DST:%.*]], i32 [[T]]
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; CHECK-NEXT: [[CMP:%.*]] = icmp ule ptr [[DST]], [[GEP_OFF]]
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%pos = icmp sge i64 %off, 0
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call void @llvm.assume(i1 %pos)
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%t = trunc i64 %off to i32
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%gep.off = getelementptr inbounds i8, ptr %dst, i32 %t
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%cmp = icmp ule ptr %dst, %gep.off
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ret i1 %cmp
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}
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