808a6ba345
Turn assertion from 2abd6d6d7ac (https://github.com/llvm/llvm-project/pull/158088) into a bail out to prevent crash when tail-folding. Fixes https://github.com/llvm/llvm-project/issues/175990.
42 lines
1.7 KiB
LLVM
42 lines
1.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
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; RUN: opt -p loop-vectorize -prefer-predicate-over-epilogue=predicate-dont-vectorize -force-vector-width=4 -S %s | FileCheck %s
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define i32 @find_last_trunc_iv(ptr %src, i64 %n) {
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; CHECK-LABEL: define i32 @find_last_trunc_iv(
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; CHECK-SAME: ptr [[SRC:%.*]], i64 [[N:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*]]:
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; CHECK-NEXT: br label %[[LOOP:.*]]
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; CHECK: [[LOOP]]:
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; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
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; CHECK-NEXT: [[RDX:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[RDX_NEXT:%.*]], %[[LOOP]] ]
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; CHECK-NEXT: [[GEP_SRC:%.*]] = getelementptr inbounds i32, ptr [[SRC]], i64 [[IV]]
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; CHECK-NEXT: [[L:%.*]] = load i32, ptr [[GEP_SRC]], align 4
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; CHECK-NEXT: [[CMP103:%.*]] = icmp eq i32 [[L]], 0
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; CHECK-NEXT: [[TMP0:%.*]] = trunc i64 [[IV]] to i32
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; CHECK-NEXT: [[RDX_NEXT]] = select i1 [[CMP103]], i32 [[TMP0]], i32 [[RDX]]
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; CHECK-NEXT: [[IV_NEXT]] = add i64 [[IV]], 1
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; CHECK-NEXT: [[EC:%.*]] = icmp eq i64 [[IV]], [[N]]
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; CHECK-NEXT: br i1 [[EC]], label %[[EXIT:.*]], label %[[LOOP]]
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; CHECK: [[EXIT]]:
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; CHECK-NEXT: [[RDX_NEXT_LCSSA:%.*]] = phi i32 [ [[RDX_NEXT]], %[[LOOP]] ]
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; CHECK-NEXT: ret i32 [[RDX_NEXT_LCSSA]]
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;
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entry:
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br label %loop
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loop:
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%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
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%rdx = phi i32 [ 0, %entry ], [ %rdx.next, %loop ]
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%gep.src = getelementptr inbounds i32, ptr %src, i64 %iv
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%l = load i32, ptr %gep.src
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%cmp103 = icmp eq i32 %l, 0
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%0 = trunc i64 %iv to i32
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%rdx.next = select i1 %cmp103, i32 %0, i32 %rdx
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%iv.next = add i64 %iv, 1
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%ec = icmp eq i64 %iv, %n
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br i1 %ec, label %exit, label %loop
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exit:
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ret i32 %rdx.next
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}
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