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llvm-project/polly/test/Isl/CodeGen/partial_write_mapped_scalar.ll

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[tests] Set -polly-import-jscop-dir=%S always This simplifies the test cases. llvm-svn: 307645
2017-07-11 18:39:01 +08:00
; RUN: opt %loadPolly -polly-import-jscop -polly-import-jscop-postfix=transformed -polly-codegen -S < %s | FileCheck %s
[CodeGen] Support partial write accesses. Allow the BlockGenerator to generate memory writes that are not defined over the complete statement domain, but only over a subset of it. It generates a condition that evaluates to 1 if executing the subdomain, and only then execute the access. Only write accesses are supported. Read accesses would require a PHINode which has a value if the access is not executed. Partial write makes DeLICM able to apply mappings that are not defined over the entire domain (for instance, a branch that leaves a loop with a PHINode in its header; a MemoryKind::PHI write when leaving is never read by its PHI read). Differential Revision: https://reviews.llvm.org/D33255 llvm-svn: 303517
2017-05-22 06:46:57 +08:00
;
; Partial write of a (mapped) scalar.
;
; for (int j = 0; j < n; j += 1) {
;body:
; val = 21.0 + 21.0;
; if (j >= 5)
;user:
; A[0] = val;
; }
define void @partial_write_mapped_scalar(i32 %n, double* noalias nonnull %A) {
entry:
br label %for
for:
%j = phi i32 [0, %entry], [%j.inc, %inc]
%j.cmp = icmp slt i32 %j, %n
br i1 %j.cmp, label %body, label %exit
body:
%val = fadd double 21.0, 21.0
%if.cond = icmp sgt i32 %j, 5
br i1 %if.cond, label %user, label %inc
user:
store double %val, double* %A
br label %inc
inc:
%j.inc = add nuw nsw i32 %j, 1
br label %for
exit:
br label %return
return:
ret void
}
; CHECK: polly.stmt.body:
; CHECK-NEXT: %p_val = fadd double 2.100000e+01, 2.100000e+01
; CHECK-NEXT: %1 = trunc i64 %polly.indvar to i32
; CHECK-NEXT: %p_if.cond = icmp sgt i32 %1, 5
; CHECK-NEXT: %2 = icmp sge i64 %polly.indvar, 5
; CHECK-NEXT: %polly.Stmt_body_Write0.cond = icmp ne i1 %2, false
; CHECK-NEXT: br i1 %polly.Stmt_body_Write0.cond, label %polly.stmt.body.Stmt_body_Write0.partial, label %polly.stmt.body.cont
; CHECK: polly.stmt.body.Stmt_body_Write0.partial:
; CHECK-NEXT: %polly.access.A = getelementptr double, double* %A, i64 1
; CHECK-NEXT: store double %p_val, double* %polly.access.A
; CHECK-NEXT: br label %polly.stmt.body.cont
; CHECK: polly.stmt.body.cont:
; CHECK-NEXT: br label %polly.cond