ffd79b3312
Get more precise cost of instruction after LoopUnroll considering that some operands of it can be simplified, e.g. induction variable will be replaced by constant after full unrolling.
36 lines
1.4 KiB
LLVM
36 lines
1.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
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; RUN: opt < %s -S -mtriple=riscv64 -passes=loop-unroll | FileCheck %s
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; Function Attrs: optsize
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define void @foo(ptr %array, i32 %x) #0 {
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; CHECK-LABEL: define void @foo
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; CHECK-SAME: (ptr [[ARRAY:%.*]], i32 [[X:%.*]]) #[[ATTR0:[0-9]+]] {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: store i32 [[X]], ptr [[ARRAY]], align 4
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; CHECK-NEXT: [[ARRAYIDX_1:%.*]] = getelementptr inbounds i32, ptr [[ARRAY]], i64 1
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; CHECK-NEXT: store i32 [[X]], ptr [[ARRAYIDX_1]], align 4
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; CHECK-NEXT: [[ARRAYIDX_2:%.*]] = getelementptr inbounds i32, ptr [[ARRAY]], i64 2
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; CHECK-NEXT: store i32 [[X]], ptr [[ARRAYIDX_2]], align 4
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; CHECK-NEXT: [[ARRAYIDX_3:%.*]] = getelementptr inbounds i32, ptr [[ARRAY]], i64 3
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; CHECK-NEXT: store i32 [[X]], ptr [[ARRAYIDX_3]], align 4
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; CHECK-NEXT: ret void
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;
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entry:
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br label %for.body
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for.body:
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds i32, ptr %array, i64 %indvars.iv
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store i32 %x, ptr %arrayidx, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond.not = icmp eq i64 %indvars.iv.next, 4
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br i1 %exitcond.not, label %for.cond.cleanup, label %for.body
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for.cond.cleanup:
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ret void
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}
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attributes #0 = { optsize }
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