derek.holloway
7502bf64a4
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80 lines
2.7 KiB
LLVM
80 lines
2.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
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; RUN: opt -S -loop-reduce < %s | FileCheck %s
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target triple = "x86_64-unknown-linux-gnu"
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declare void @use(i1)
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; Make sure this does not assert.
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define i16 @test(i16 %start) #0 {
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; CHECK-LABEL: define i16 @test(
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; CHECK-SAME: i16 [[START:%.*]]) #[[ATTR0:[0-9]+]] {
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; CHECK-NEXT: [[ENTRY:.*]]:
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; CHECK-NEXT: [[TMP0:%.*]] = sub i16 0, [[START]]
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; CHECK-NEXT: [[TMP1:%.*]] = zext i16 [[TMP0]] to i64
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; CHECK-NEXT: br label %[[LOOP:.*]]
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; CHECK: [[LOOP]]:
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; CHECK-NEXT: [[LSR_IV:%.*]] = phi i64 [ [[LSR_IV_NEXT:%.*]], %[[LOOP]] ], [ 65536, %[[ENTRY]] ]
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; CHECK-NEXT: [[TMP2:%.*]] = add i64 [[TMP1]], [[LSR_IV]]
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; CHECK-NEXT: [[TMP:%.*]] = trunc i64 [[TMP2]] to i16
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; CHECK-NEXT: [[IV2_CMP:%.*]] = icmp ne i16 [[TMP]], 0
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; CHECK-NEXT: call void @use(i1 [[IV2_CMP]])
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; CHECK-NEXT: [[LSR_IV_NEXT]] = add nsw i64 [[LSR_IV]], -1
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; CHECK-NEXT: [[IV1_CMP:%.*]] = icmp eq i64 [[LSR_IV_NEXT]], 65532
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; CHECK-NEXT: br i1 [[IV1_CMP]], label %[[EXIT:.*]], label %[[LOOP]]
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; CHECK: [[EXIT]]:
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; CHECK-NEXT: [[TMP3:%.*]] = zext i16 [[START]] to i64
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; CHECK-NEXT: [[TMP4:%.*]] = sub i64 [[TMP3]], [[LSR_IV_NEXT]]
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; CHECK-NEXT: [[TMP1:%.*]] = trunc i64 [[TMP4]] to i16
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; CHECK-NEXT: ret i16 [[TMP1]]
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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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%iv1 = phi i64 [ 3, %entry ], [ %iv1.dec, %loop ]
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%iv2 = phi i16 [ %start, %entry ], [ %iv2.inc, %loop ]
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%iv2.inc = add i16 %iv2, 1
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%iv2.cmp = icmp ne i16 %iv2, 0
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call void @use(i1 %iv2.cmp)
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%iv1.dec = add i64 %iv1, -1
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%iv1.cmp = icmp eq i64 %iv1, 0
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br i1 %iv1.cmp, label %exit, label %loop
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exit:
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ret i16 %iv2.inc
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}
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define i16 @test2(i16 %arg1, i16 %arg2) {
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; CHECK-LABEL: define i16 @test2(
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; CHECK-SAME: i16 [[ARG1:%.*]], i16 [[ARG2:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*]]:
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; CHECK-NEXT: [[TMP0:%.*]] = add i16 [[ARG2]], [[ARG1]]
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; CHECK-NEXT: [[TMP1:%.*]] = add i16 [[TMP0]], -1
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; CHECK-NEXT: br label %[[LOOP:.*]]
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; CHECK: [[LOOP]]:
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; CHECK-NEXT: [[LSR_IV:%.*]] = phi i16 [ [[LSR_IV_NEXT:%.*]], %[[LOOP]] ], [ [[TMP1]], %[[ENTRY]] ]
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i16 [[LSR_IV]], -2
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; CHECK-NEXT: call void @use(i1 [[CMP]])
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; CHECK-NEXT: [[LSR_IV_NEXT]] = add i16 [[LSR_IV]], 1
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; CHECK-NEXT: br i1 false, label %[[EXIT:.*]], label %[[LOOP]]
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; CHECK: [[EXIT]]:
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; CHECK-NEXT: ret i16 [[LSR_IV_NEXT]]
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;
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entry:
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%start = add i16 %arg1, %arg2
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br label %loop
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loop:
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%iv = phi i16 [ %start, %entry ], [ %iv.inc, %loop ]
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%iv.inc = add i16 %iv, 1
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%cmp = icmp eq i16 %iv.inc, 0
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call void @use(i1 %cmp)
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br i1 false, label %exit, label %loop
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exit:
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ret i16 %iv
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}
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attributes #0 = { "target-cpu"="x86-64" }
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