d15f3e828d
This patch is an extension to #115128. After profiling LLVM test-suite, I see a lot of loop nest of depth more than `MaxLoopNestDepth` which is 10. Early exit for them would save compile-time as it would avoid computing DependenceInfo and CacheCost. Please see 'bound-max-depth' branch on compile-time-tracker.
66 lines
2.1 KiB
LLVM
66 lines
2.1 KiB
LLVM
; REQUIRES: asserts
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; RUN: opt < %s -passes=loop-interchange -debug -disable-output 2>&1 | FileCheck %s
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128-Fn32"
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@N = dso_local global i32 0, align 4
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@a = dso_local global ptr null, align 8
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@b = dso_local global ptr null, align 8
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@c = dso_local global ptr null, align 8
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; Loop interchange should not run delinearization
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; for one loop case and should bail out early.
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; CHECK-NOT: Delinearizing
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; CHECK-NOT: Strides:
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; CHECK-NOT: Terms:
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; CHECK: Unsupported depth of loop nest 1, the supported range is [2, 10].
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define void @foo() {
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entry:
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%retval = alloca i32, align 4
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%i = alloca i32, align 4
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store i32 0, ptr %retval, align 4
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store i32 0, ptr %i, align 4
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br label %for.cond
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for.cond: ; preds = %for.inc, %entry
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%0 = load i32, ptr %i, align 4
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%1 = load i32, ptr @N, align 4
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%cmp = icmp ult i32 %0, %1
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br i1 %cmp, label %for.body, label %for.cond.cleanup
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for.cond.cleanup: ; preds = %for.cond
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br label %for.end
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for.body: ; preds = %for.cond
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%2 = load ptr, ptr @b, align 8
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%3 = load i32, ptr %i, align 4
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%idxprom = zext i32 %3 to i64
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%arrayidx = getelementptr inbounds nuw i32, ptr %2, i64 %idxprom
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%4 = load i32, ptr %arrayidx, align 4
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%5 = load ptr, ptr @c, align 8
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%6 = load i32, ptr %i, align 4
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%idxprom1 = zext i32 %6 to i64
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%arrayidx2 = getelementptr inbounds nuw i32, ptr %5, i64 %idxprom1
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%7 = load i32, ptr %arrayidx2, align 4
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%add = add nsw i32 %4, %7
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%8 = load ptr, ptr @a, align 8
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%9 = load i32, ptr %i, align 4
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%idxprom3 = zext i32 %9 to i64
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%arrayidx4 = getelementptr inbounds nuw i32, ptr %8, i64 %idxprom3
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store i32 %add, ptr %arrayidx4, align 4
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br label %for.inc
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for.inc: ; preds = %for.body
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%10 = load i32, ptr %i, align 4
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%inc = add i32 %10, 1
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store i32 %inc, ptr %i, align 4
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br label %for.cond
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for.end: ; preds = %for.cond.cleanup
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ret void
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}
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