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45f8df4a39
As noted in the test change, this is not trivially NFC, but all of the changes in output are cases where the SCEVExpander form is more canonical/optimal than the hand generation. llvm-svn: 365075
75 lines
2.6 KiB
LLVM
75 lines
2.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -indvars -S | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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define void @test_int(i32 %start, i32* %p) {
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; CHECK-LABEL: @test_int(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = trunc i32 [[START:%.*]] to i3
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; CHECK-NEXT: [[TMP1:%.*]] = sub i3 0, [[TMP0]]
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[I2:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[I2_INC:%.*]], [[LOOP]] ]
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; CHECK-NEXT: [[I2_INC]] = add nuw nsw i32 [[I2]], 1
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; CHECK-NEXT: store volatile i32 [[I2_INC]], i32* [[P:%.*]]
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; CHECK-NEXT: [[LFTR_WIDEIV:%.*]] = trunc i32 [[I2_INC]] to i3
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; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i3 [[LFTR_WIDEIV]], [[TMP1]]
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; CHECK-NEXT: br i1 [[EXITCOND]], label [[END:%.*]], label [[LOOP]]
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; CHECK: end:
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; CHECK-NEXT: ret void
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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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%i = phi i32 [ %start, %entry ], [ %i.inc, %loop ]
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%i2 = phi i32 [ 0, %entry ], [ %i2.inc, %loop ]
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%i.inc = add nuw i32 %i, 1
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%i2.inc = add nuw i32 %i2, 1
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store volatile i32 %i2.inc, i32* %p
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%and = and i32 %i.inc, 7
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%cmp = icmp eq i32 %and, 0
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br i1 %cmp, label %end, label %loop
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end:
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ret void
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}
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@data = global [256 x i8] zeroinitializer
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define void @test_ptr(i32 %start) {
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; CHECK-LABEL: @test_ptr(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = trunc i32 [[START:%.*]] to i3
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; CHECK-NEXT: [[TMP1:%.*]] = sub i3 -1, [[TMP0]]
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; CHECK-NEXT: [[TMP2:%.*]] = zext i3 [[TMP1]] to i64
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; CHECK-NEXT: [[TMP3:%.*]] = add nuw nsw i64 [[TMP2]], 1
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; CHECK-NEXT: [[SCEVGEP:%.*]] = getelementptr [256 x i8], [256 x i8]* @data, i64 0, i64 [[TMP3]]
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[P:%.*]] = phi i8* [ getelementptr inbounds ([256 x i8], [256 x i8]* @data, i64 0, i64 0), [[ENTRY:%.*]] ], [ [[P_INC:%.*]], [[LOOP]] ]
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; CHECK-NEXT: [[P_INC]] = getelementptr inbounds i8, i8* [[P]], i64 1
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; CHECK-NEXT: store volatile i8 0, i8* [[P_INC]]
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; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i8* [[P_INC]], [[SCEVGEP]]
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; CHECK-NEXT: br i1 [[EXITCOND]], label [[END:%.*]], label [[LOOP]]
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; CHECK: end:
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; CHECK-NEXT: ret void
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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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%i = phi i32 [ %start, %entry ], [ %i.inc, %loop ]
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%p = phi i8* [ getelementptr inbounds ([256 x i8], [256 x i8]* @data, i64 0, i64 0), %entry ], [ %p.inc, %loop ]
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%i.inc = add nuw i32 %i, 1
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%p.inc = getelementptr inbounds i8, i8* %p, i64 1
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store volatile i8 0, i8* %p.inc
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%and = and i32 %i.inc, 7
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%cmp = icmp eq i32 %and, 0
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br i1 %cmp, label %end, label %loop
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end:
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ret void
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}
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