46 lines
1.5 KiB
LLVM
46 lines
1.5 KiB
LLVM
; RUN: opt -debugify -loop-unroll -mcpu=znver3 -pass-remarks=loop-unroll -pass-remarks-analysis=loop-unroll < %s -S 2>&1 | FileCheck --check-prefixes=ALL,UNROLL %s
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; RUN: opt -debugify -loop-unroll -mcpu=znver3 -pass-remarks=TTI -pass-remarks-analysis=TTI < %s -S 2>&1 | FileCheck --check-prefixes=ALL,TTI %s
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target datalayout = "e-m:e-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-unknown-linux-gnu"
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; TTI: remark: <stdin>:7:1: advising against unrolling the loop because it contains a call
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; UNROLL: remark: <stdin>:14:1: unrolled loop by a factor of 8 with run-time trip count
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define void @contains_external_call(i32 %count) {
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; ALL-LABEL: @contains_external_call(
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; ALL-NOT: unroll
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entry:
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%cmp.not3 = icmp eq i32 %count, 0
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br i1 %cmp.not3, label %for.cond.cleanup, label %for.body
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for.body:
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%i.04 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
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tail call void @sideeffect()
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%inc = add nuw nsw i32 %i.04, 1
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%cmp.not = icmp eq i32 %inc, %count
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br i1 %cmp.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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declare void @sideeffect()
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define i32 @no_external_calls(i32 %count) {
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; ALL-LABEL: @no_external_calls(
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; ALL: unroll
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entry:
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%cmp.not5 = icmp eq i32 %count, 0
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br i1 %cmp.not5, label %for.end, label %for.body
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for.body:
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%i.06 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
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%inc = add nuw nsw i32 %i.06, 1
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%cmp.not = icmp eq i32 %inc, %count
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br i1 %cmp.not, label %for.end, label %for.body
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for.end:
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ret i32 %count
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}
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