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llvm-project/polly/test/ScopDetect/mod_ref_read_pointer.ll

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Add option to disallow modref function calls in scops. This might be useful to evaluate the benefit of us handling modref funciton calls. Also, a new bug that was triggered by modref function calls was recently reported http://llvm.org/PR27035. To ensure the same issue does not cause troubles for other people, we temporarily disable this until the bug is resolved. llvm-svn: 264140
2016-03-23 14:40:15 +08:00
; RUN: opt %loadPolly -basicaa -polly-detect -analyze \
; RUN: -polly-allow-modref-calls < %s | FileCheck %s -check-prefix=MODREF
; RUN: opt %loadPolly -basicaa -polly-detect -analyze \
; RUN: < %s | FileCheck %s
Support calls with known ModRef function behaviour Check the ModRefBehaviour of functions in order to decide whether or not a call instruction might be acceptable. Differential Revision: http://reviews.llvm.org/D5227 llvm-svn: 261866
2016-02-25 22:08:48 +08:00
;
Remove immediate dominator heuristic for error block detection. This patch removes the heuristic in - Polly :: lib/Support/ScopHelper.cpp The heuristic forces blocks that directly follow a loop header to not to be considered error blocks. It was introduced in r249611 with the following commit message: > This replaces the support for user defined error functions by a > heuristic that tries to determine if a call to a non-pure function > should be considered "an error". If so the block is assumed not to be > executed at runtime. While treating all non-pure function calls as > errors will allow a lot more regions to be analyzed, it will also > cause us to dismiss a lot again due to an infeasible runtime context. > This patch tries to limit that effect. A non-pure function call is > considered an error if it is executed only in conditionally with > regards to a cheap but simple heuristic. In the code below `CCK_Abort2()` would be considered as an error block, but not `CCK_Abort1()` due to this heuristic. ``` for (int i = 0; i < n; i+=1) { if (ErrorCondition1) CCK_Abort1(); // No __attribute__((noreturn)) if (ErrorCondition2) CCK_Abort2(); // No __attribute__((noreturn)) } ``` This does not seem useful. Checking error conditions in the beginning of some work is quite common. It causes a switch default-case to be not considered an error block in SPEC's cactuBSSN. The comment justifying the heuristic mentions a "load", which does not seem to be applicable here. It has been proposed to remove the heuristic. In addition, the patch fixes the following test cases: - Polly :: ScopDetect/mod_ref_read_pointer.ll - Polly :: ScopInfo/max-loop-depth.ll - Polly :: ScopInfo/mod_ref_access_pointee_arguments.ll - Polly :: ScopInfo/mod_ref_read_pointee_arguments.ll - Polly :: ScopInfo/mod_ref_read_pointer.ll - Polly :: ScopInfo/mod_ref_read_pointers.ll The test cases failed after removing the heuristic. Differential Revision: https://reviews.llvm.org/D45274 Contributed-by: Lorenzo Chelini <l.chelini@icloud.com> llvm-svn: 329548
2018-04-09 14:07:44 +08:00
; CHECK-NOT: Valid Region for Scop: for.body => for.end
; MODREF: Valid Region for Scop: for.body => for.end
Support calls with known ModRef function behaviour Check the ModRefBehaviour of functions in order to decide whether or not a call instruction might be acceptable. Differential Revision: http://reviews.llvm.org/D5227 llvm-svn: 261866
2016-02-25 22:08:48 +08:00
;
; #pragma readonly
; int func(int *A);
;
; void jd(int *A) {
; for (int i = 0; i < 1024; i++)
; A[i + 2] = func(A);
; }
;
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
declare i32 @func(i32* %A) #1
define void @jd(i32* %A) {
entry:
Remove immediate dominator heuristic for error block detection. This patch removes the heuristic in - Polly :: lib/Support/ScopHelper.cpp The heuristic forces blocks that directly follow a loop header to not to be considered error blocks. It was introduced in r249611 with the following commit message: > This replaces the support for user defined error functions by a > heuristic that tries to determine if a call to a non-pure function > should be considered "an error". If so the block is assumed not to be > executed at runtime. While treating all non-pure function calls as > errors will allow a lot more regions to be analyzed, it will also > cause us to dismiss a lot again due to an infeasible runtime context. > This patch tries to limit that effect. A non-pure function call is > considered an error if it is executed only in conditionally with > regards to a cheap but simple heuristic. In the code below `CCK_Abort2()` would be considered as an error block, but not `CCK_Abort1()` due to this heuristic. ``` for (int i = 0; i < n; i+=1) { if (ErrorCondition1) CCK_Abort1(); // No __attribute__((noreturn)) if (ErrorCondition2) CCK_Abort2(); // No __attribute__((noreturn)) } ``` This does not seem useful. Checking error conditions in the beginning of some work is quite common. It causes a switch default-case to be not considered an error block in SPEC's cactuBSSN. The comment justifying the heuristic mentions a "load", which does not seem to be applicable here. It has been proposed to remove the heuristic. In addition, the patch fixes the following test cases: - Polly :: ScopDetect/mod_ref_read_pointer.ll - Polly :: ScopInfo/max-loop-depth.ll - Polly :: ScopInfo/mod_ref_access_pointee_arguments.ll - Polly :: ScopInfo/mod_ref_read_pointee_arguments.ll - Polly :: ScopInfo/mod_ref_read_pointer.ll - Polly :: ScopInfo/mod_ref_read_pointers.ll The test cases failed after removing the heuristic. Differential Revision: https://reviews.llvm.org/D45274 Contributed-by: Lorenzo Chelini <l.chelini@icloud.com> llvm-svn: 329548
2018-04-09 14:07:44 +08:00
br label %for.body
Support calls with known ModRef function behaviour Check the ModRefBehaviour of functions in order to decide whether or not a call instruction might be acceptable. Differential Revision: http://reviews.llvm.org/D5227 llvm-svn: 261866
2016-02-25 22:08:48 +08:00
Remove immediate dominator heuristic for error block detection. This patch removes the heuristic in - Polly :: lib/Support/ScopHelper.cpp The heuristic forces blocks that directly follow a loop header to not to be considered error blocks. It was introduced in r249611 with the following commit message: > This replaces the support for user defined error functions by a > heuristic that tries to determine if a call to a non-pure function > should be considered "an error". If so the block is assumed not to be > executed at runtime. While treating all non-pure function calls as > errors will allow a lot more regions to be analyzed, it will also > cause us to dismiss a lot again due to an infeasible runtime context. > This patch tries to limit that effect. A non-pure function call is > considered an error if it is executed only in conditionally with > regards to a cheap but simple heuristic. In the code below `CCK_Abort2()` would be considered as an error block, but not `CCK_Abort1()` due to this heuristic. ``` for (int i = 0; i < n; i+=1) { if (ErrorCondition1) CCK_Abort1(); // No __attribute__((noreturn)) if (ErrorCondition2) CCK_Abort2(); // No __attribute__((noreturn)) } ``` This does not seem useful. Checking error conditions in the beginning of some work is quite common. It causes a switch default-case to be not considered an error block in SPEC's cactuBSSN. The comment justifying the heuristic mentions a "load", which does not seem to be applicable here. It has been proposed to remove the heuristic. In addition, the patch fixes the following test cases: - Polly :: ScopDetect/mod_ref_read_pointer.ll - Polly :: ScopInfo/max-loop-depth.ll - Polly :: ScopInfo/mod_ref_access_pointee_arguments.ll - Polly :: ScopInfo/mod_ref_read_pointee_arguments.ll - Polly :: ScopInfo/mod_ref_read_pointer.ll - Polly :: ScopInfo/mod_ref_read_pointers.ll The test cases failed after removing the heuristic. Differential Revision: https://reviews.llvm.org/D45274 Contributed-by: Lorenzo Chelini <l.chelini@icloud.com> llvm-svn: 329548
2018-04-09 14:07:44 +08:00
for.body: ; preds = %entry, %for.inc
%i = phi i64 [ 0, %entry ], [ %i.next, %for.inc ]
Support calls with known ModRef function behaviour Check the ModRefBehaviour of functions in order to decide whether or not a call instruction might be acceptable. Differential Revision: http://reviews.llvm.org/D5227 llvm-svn: 261866
2016-02-25 22:08:48 +08:00
%call = call i32 @func(i32* %A)
Remove immediate dominator heuristic for error block detection. This patch removes the heuristic in - Polly :: lib/Support/ScopHelper.cpp The heuristic forces blocks that directly follow a loop header to not to be considered error blocks. It was introduced in r249611 with the following commit message: > This replaces the support for user defined error functions by a > heuristic that tries to determine if a call to a non-pure function > should be considered "an error". If so the block is assumed not to be > executed at runtime. While treating all non-pure function calls as > errors will allow a lot more regions to be analyzed, it will also > cause us to dismiss a lot again due to an infeasible runtime context. > This patch tries to limit that effect. A non-pure function call is > considered an error if it is executed only in conditionally with > regards to a cheap but simple heuristic. In the code below `CCK_Abort2()` would be considered as an error block, but not `CCK_Abort1()` due to this heuristic. ``` for (int i = 0; i < n; i+=1) { if (ErrorCondition1) CCK_Abort1(); // No __attribute__((noreturn)) if (ErrorCondition2) CCK_Abort2(); // No __attribute__((noreturn)) } ``` This does not seem useful. Checking error conditions in the beginning of some work is quite common. It causes a switch default-case to be not considered an error block in SPEC's cactuBSSN. The comment justifying the heuristic mentions a "load", which does not seem to be applicable here. It has been proposed to remove the heuristic. In addition, the patch fixes the following test cases: - Polly :: ScopDetect/mod_ref_read_pointer.ll - Polly :: ScopInfo/max-loop-depth.ll - Polly :: ScopInfo/mod_ref_access_pointee_arguments.ll - Polly :: ScopInfo/mod_ref_read_pointee_arguments.ll - Polly :: ScopInfo/mod_ref_read_pointer.ll - Polly :: ScopInfo/mod_ref_read_pointers.ll The test cases failed after removing the heuristic. Differential Revision: https://reviews.llvm.org/D45274 Contributed-by: Lorenzo Chelini <l.chelini@icloud.com> llvm-svn: 329548
2018-04-09 14:07:44 +08:00
%tmp = add nsw i64 %i, 2
Support calls with known ModRef function behaviour Check the ModRefBehaviour of functions in order to decide whether or not a call instruction might be acceptable. Differential Revision: http://reviews.llvm.org/D5227 llvm-svn: 261866
2016-02-25 22:08:48 +08:00
%arrayidx = getelementptr inbounds i32, i32* %A, i64 %tmp
store i32 %call, i32* %arrayidx, align 4
br label %for.inc
for.inc: ; preds = %for.body
Remove immediate dominator heuristic for error block detection. This patch removes the heuristic in - Polly :: lib/Support/ScopHelper.cpp The heuristic forces blocks that directly follow a loop header to not to be considered error blocks. It was introduced in r249611 with the following commit message: > This replaces the support for user defined error functions by a > heuristic that tries to determine if a call to a non-pure function > should be considered "an error". If so the block is assumed not to be > executed at runtime. While treating all non-pure function calls as > errors will allow a lot more regions to be analyzed, it will also > cause us to dismiss a lot again due to an infeasible runtime context. > This patch tries to limit that effect. A non-pure function call is > considered an error if it is executed only in conditionally with > regards to a cheap but simple heuristic. In the code below `CCK_Abort2()` would be considered as an error block, but not `CCK_Abort1()` due to this heuristic. ``` for (int i = 0; i < n; i+=1) { if (ErrorCondition1) CCK_Abort1(); // No __attribute__((noreturn)) if (ErrorCondition2) CCK_Abort2(); // No __attribute__((noreturn)) } ``` This does not seem useful. Checking error conditions in the beginning of some work is quite common. It causes a switch default-case to be not considered an error block in SPEC's cactuBSSN. The comment justifying the heuristic mentions a "load", which does not seem to be applicable here. It has been proposed to remove the heuristic. In addition, the patch fixes the following test cases: - Polly :: ScopDetect/mod_ref_read_pointer.ll - Polly :: ScopInfo/max-loop-depth.ll - Polly :: ScopInfo/mod_ref_access_pointee_arguments.ll - Polly :: ScopInfo/mod_ref_read_pointee_arguments.ll - Polly :: ScopInfo/mod_ref_read_pointer.ll - Polly :: ScopInfo/mod_ref_read_pointers.ll The test cases failed after removing the heuristic. Differential Revision: https://reviews.llvm.org/D45274 Contributed-by: Lorenzo Chelini <l.chelini@icloud.com> llvm-svn: 329548
2018-04-09 14:07:44 +08:00
%i.next = add nuw nsw i64 %i, 1
%exitcond = icmp ne i64 %i.next, 1024
br i1 %exitcond, label %for.body, label %for.end
Support calls with known ModRef function behaviour Check the ModRefBehaviour of functions in order to decide whether or not a call instruction might be acceptable. Differential Revision: http://reviews.llvm.org/D5227 llvm-svn: 261866
2016-02-25 22:08:48 +08:00
Remove immediate dominator heuristic for error block detection. This patch removes the heuristic in - Polly :: lib/Support/ScopHelper.cpp The heuristic forces blocks that directly follow a loop header to not to be considered error blocks. It was introduced in r249611 with the following commit message: > This replaces the support for user defined error functions by a > heuristic that tries to determine if a call to a non-pure function > should be considered "an error". If so the block is assumed not to be > executed at runtime. While treating all non-pure function calls as > errors will allow a lot more regions to be analyzed, it will also > cause us to dismiss a lot again due to an infeasible runtime context. > This patch tries to limit that effect. A non-pure function call is > considered an error if it is executed only in conditionally with > regards to a cheap but simple heuristic. In the code below `CCK_Abort2()` would be considered as an error block, but not `CCK_Abort1()` due to this heuristic. ``` for (int i = 0; i < n; i+=1) { if (ErrorCondition1) CCK_Abort1(); // No __attribute__((noreturn)) if (ErrorCondition2) CCK_Abort2(); // No __attribute__((noreturn)) } ``` This does not seem useful. Checking error conditions in the beginning of some work is quite common. It causes a switch default-case to be not considered an error block in SPEC's cactuBSSN. The comment justifying the heuristic mentions a "load", which does not seem to be applicable here. It has been proposed to remove the heuristic. In addition, the patch fixes the following test cases: - Polly :: ScopDetect/mod_ref_read_pointer.ll - Polly :: ScopInfo/max-loop-depth.ll - Polly :: ScopInfo/mod_ref_access_pointee_arguments.ll - Polly :: ScopInfo/mod_ref_read_pointee_arguments.ll - Polly :: ScopInfo/mod_ref_read_pointer.ll - Polly :: ScopInfo/mod_ref_read_pointers.ll The test cases failed after removing the heuristic. Differential Revision: https://reviews.llvm.org/D45274 Contributed-by: Lorenzo Chelini <l.chelini@icloud.com> llvm-svn: 329548
2018-04-09 14:07:44 +08:00
for.end: ; preds = %for.inc
Support calls with known ModRef function behaviour Check the ModRefBehaviour of functions in order to decide whether or not a call instruction might be acceptable. Differential Revision: http://reviews.llvm.org/D5227 llvm-svn: 261866
2016-02-25 22:08:48 +08:00
ret void
}
attributes #1 = { nounwind readonly }