7b3fe5fd42
Split off from PR #163525, this standalone patch replaces simple cases where undef is used as a value for arithmetic or getelementptr instructions. This will reduce the likelihood of contributors hitting the `undef deprecator` warning in github.
91 lines
3.8 KiB
LLVM
91 lines
3.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
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; RUN: opt < %s -passes=loop-vectorize -S | FileCheck %s
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; This is a bugpoint reduction of a test from PR43582:
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; https://bugs.llvm.org/show_bug.cgi?id=43582
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; ...but it's over-simplifying the underlying question:
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; TODO: Should this be vectorized rather than allowing the backend to load combine?
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; The original code is a bswap pattern.
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target datalayout = "e-m:w-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-w64-windows-gnu"
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define void @cff_index_load_offsets(i1 %cond, i8 %x, ptr %p, ptr %pend) #0 {
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; CHECK-LABEL: define void @cff_index_load_offsets(
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; CHECK-SAME: i1 [[COND:%.*]], i8 [[X:%.*]], ptr [[P:%.*]], ptr [[PEND:%.*]]) #[[ATTR0:[0-9]+]] {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: br i1 [[COND]], label %[[IF_THEN:.*]], label %[[EXIT:.*]]
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; CHECK: [[IF_THEN]]:
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; CHECK-NEXT: br label %[[FOR_BODY68:.*]]
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; CHECK: [[FOR_BODY68]]:
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; CHECK-NEXT: [[P_359:%.*]] = phi ptr [ [[ADD_PTR86:%.*]], %[[FOR_BODY68]] ], [ null, %[[IF_THEN]] ]
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; CHECK-NEXT: [[CONV70:%.*]] = zext i8 [[X]] to i32
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; CHECK-NEXT: [[SHL71:%.*]] = shl nuw i32 [[CONV70]], 24
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; CHECK-NEXT: [[TMP0:%.*]] = load i8, ptr [[P]], align 1, !tbaa [[CHAR_TBAA1:![0-9]+]]
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; CHECK-NEXT: [[CONV73:%.*]] = zext i8 [[TMP0]] to i32
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; CHECK-NEXT: [[SHL74:%.*]] = shl nuw nsw i32 [[CONV73]], 16
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; CHECK-NEXT: [[OR75:%.*]] = or i32 [[SHL74]], [[SHL71]]
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; CHECK-NEXT: [[TMP1:%.*]] = load i8, ptr [[P]], align 1, !tbaa [[CHAR_TBAA1]]
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; CHECK-NEXT: [[SHL78:%.*]] = shl nuw nsw i32 12, 8
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; CHECK-NEXT: [[OR79:%.*]] = or i32 [[OR75]], [[SHL78]]
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; CHECK-NEXT: [[CONV81:%.*]] = zext i8 [[TMP1]] to i32
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; CHECK-NEXT: [[OR83:%.*]] = or i32 [[OR79]], [[CONV81]]
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; CHECK-NEXT: store i32 [[OR83]], ptr [[P]], align 4, !tbaa [[LONG_TBAA4:![0-9]+]]
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; CHECK-NEXT: [[ADD_PTR86]] = getelementptr inbounds i8, ptr [[P_359]], i64 4
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; CHECK-NEXT: [[CMP66:%.*]] = icmp ult ptr [[ADD_PTR86]], [[PEND]]
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; CHECK-NEXT: br i1 [[CMP66]], label %[[FOR_BODY68]], label %[[SW_EPILOG:.*]]
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; CHECK: [[SW_EPILOG]]:
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; CHECK-NEXT: unreachable
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; CHECK: [[EXIT]]:
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; CHECK-NEXT: ret void
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;
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entry:
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br i1 %cond, label %if.then, label %Exit
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if.then: ; preds = %entry
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br label %for.body68
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for.body68: ; preds = %for.body68, %if.then
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%p.359 = phi ptr [ %add.ptr86, %for.body68 ], [ null, %if.then ]
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%conv70 = zext i8 %x to i32
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%shl71 = shl nuw i32 %conv70, 24
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%0 = load i8, ptr %p, align 1, !tbaa !1
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%conv73 = zext i8 %0 to i32
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%shl74 = shl nuw nsw i32 %conv73, 16
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%or75 = or i32 %shl74, %shl71
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%1 = load i8, ptr %p, align 1, !tbaa !1
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%shl78 = shl nuw nsw i32 12, 8
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%or79 = or i32 %or75, %shl78
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%conv81 = zext i8 %1 to i32
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%or83 = or i32 %or79, %conv81
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store i32 %or83, ptr %p, align 4, !tbaa !4
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%add.ptr86 = getelementptr inbounds i8, ptr %p.359, i64 4
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%cmp66 = icmp ult ptr %add.ptr86, %pend
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br i1 %cmp66, label %for.body68, label %sw.epilog
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sw.epilog: ; preds = %for.body68
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unreachable
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Exit: ; preds = %entry
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ret void
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}
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attributes #0 = { "use-soft-float"="false" }
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!llvm.ident = !{!0}
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!0 = !{!"clang version 10.0.0 (https://github.com/llvm/llvm-project.git 0fedc26a0dc0066f3968b9fea6a4e1f746c8d5a4)"}
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!1 = !{!2, !2, i64 0}
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!2 = !{!"omnipotent char", !3, i64 0}
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!3 = !{!"Simple C/C++ TBAA"}
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!4 = !{!5, !5, i64 0}
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!5 = !{!"long", !2, i64 0}
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;.
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; CHECK: [[CHAR_TBAA1]] = !{[[META2:![0-9]+]], [[META2]], i64 0}
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; CHECK: [[META2]] = !{!"omnipotent char", [[META3:![0-9]+]], i64 0}
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; CHECK: [[META3]] = !{!"Simple C/C++ TBAA"}
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; CHECK: [[LONG_TBAA4]] = !{[[META5:![0-9]+]], [[META5]], i64 0}
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; CHECK: [[META5]] = !{!"long", [[META2]], i64 0}
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;.
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