3081b0f5ec
When the Polly code generation was written we did not correctly update the LoopInfo data, but still claimed that the loop information is correct. This does not only lead to missed optimizations, but it can also cause miscompilations in case passes such as LoopSimplify are run after Polly. Reported-by: Sergei Larin <slarin@codeaurora.org> llvm-svn: 181987
64 lines
2.3 KiB
LLVM
64 lines
2.3 KiB
LLVM
; RUN: opt %loadPolly -polly-ast -analyze < %s | FileCheck %s
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; RUN: opt %loadPolly -polly-codegen-isl -S < %s | FileCheck %s -check-prefix=CODEGEN
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; RUN: opt %loadPolly -polly-codegen-isl -loops -analyze < %s | FileCheck %s -check-prefix=LOOPS
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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target triple = "x86_64-pc-linux-gnu"
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@A = common global [1024 x i32] zeroinitializer
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define void @bar(i64 %n) {
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start:
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%n_plus_one = add i64 %n, 1
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fence seq_cst
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br label %loop.header
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loop.header:
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%i = phi i64 [ 0, %start ], [ %i.next, %loop.backedge ]
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%scevgep = getelementptr [1024 x i32]* @A, i64 0, i64 %i
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%exitcond = icmp ne i64 %i, %n_plus_one
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br i1 %exitcond, label %loop.body, label %ret
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loop.body:
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store i32 1, i32* %scevgep
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br label %loop.backedge
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loop.backedge:
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%i.next = add nsw i64 %i, 1
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br label %loop.header
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ret:
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fence seq_cst
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ret void
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}
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; CHECK: for (int c1 = 0; c1 <= n; c1 += 1)
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; CHECK: Stmt_loop_body(c1)
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; CODEGEN: polly.start:
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; CODEGEN: br label %polly.loop_if
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; CODEGEN: polly.loop_exit:
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; CODEGEN: br label %polly.merge_new_and_old
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; CODEGEN: polly.loop_if:
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; CODEGEN: %polly.loop_guard = icmp sle i64 0, %n
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; CODEGEN: br i1 %polly.loop_guard, label %polly.loop_preheader, label %polly.loop_exit
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; CODEGEN: polly.loop_header:
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; CODEGEN: %polly.indvar = phi i64 [ 0, %polly.loop_preheader ], [ %polly.indvar_next, %polly.stmt.loop.body ]
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; CODEGEN: br label %polly.stmt.loop.body
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; CODEGEN: polly.stmt.loop.body:
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; CODEGEN: %p_scevgep.moved.to.loop.body = getelementptr [1024 x i32]* @A, i64 0, i64 %polly.indvar
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; CODEGEN: store i32 1, i32* %p_scevgep.moved.to.loop.body
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; CODEGEN: %polly.indvar_next = add nsw i64 %polly.indvar, 1
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; CODEGEN: %polly.adjust_ub = sub i64 %n, 1
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; CODEGEN: %polly.loop_cond = icmp sle i64 %polly.indvar, %polly.adjust_ub
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; CODEGEN: br i1 %polly.loop_cond, label %polly.loop_header, label %polly.loop_exit
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; CODEGEN: polly.loop_preheader:
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; CODEGEN: br label %polly.loop_header
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; LOOPS: Loop at depth 1 containing: %loop.header<header><exiting>,%loop.body,%loop.backedge<latch>
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; LOOPS: Loop at depth 1 containing: %polly.loop_header<header>,%polly.stmt.loop.body<latch><exiting>
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