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llvm-project/polly/test/Isl/CodeGen/scalar-store-from-same-bb.ll

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tests: Drop -polly-detect-unprofitable and -polly-no-early-exit These flags are now always passed to all tests and need to be disabled if not needed. Disabling these flags, rather than passing them to almost all tests, significantly simplfies our RUN: lines. llvm-svn: 249422
2015-10-06 23:36:44 +08:00
; RUN: opt %loadPolly \
Reapply "BlockGenerator: Generate synthesisable instructions only on-demand" Instructions which we can synthesis from a SCEV expression are not generated directly, but only when they are used as an operand of another instruction. This avoids generating unnecessary instructions and works more reliably than first inserting them and then deleting them later on. This commit was reverted in r248860 due to a remaining miscompile, where we forgot to synthesis the operand values that were referenced from scalar writes. test/Isl/CodeGen/scalar-store-from-same-bb.ll tests that we do this now correctly. llvm-svn: 248900
2015-09-30 21:36:54 +08:00
; RUN: -polly-codegen -S < %s | FileCheck %s
; This test ensures that the expression N + 1 that is stored in the phi-node
; alloca, is directly computed and not incorrectly transfered through memory.
tests: make test cases more robust using regexp llvm-svn: 276262
2016-07-21 19:48:31 +08:00
; CHECK: store i64 [[REG:%.*]], i64* %res.phiops
; CHECK: [[REG]] = add i64 %N, 1
Reapply "BlockGenerator: Generate synthesisable instructions only on-demand" Instructions which we can synthesis from a SCEV expression are not generated directly, but only when they are used as an operand of another instruction. This avoids generating unnecessary instructions and works more reliably than first inserting them and then deleting them later on. This commit was reverted in r248860 due to a remaining miscompile, where we forgot to synthesis the operand values that were referenced from scalar writes. test/Isl/CodeGen/scalar-store-from-same-bb.ll tests that we do this now correctly. llvm-svn: 248900
2015-09-30 21:36:54 +08:00
define i64 @foo(float* %A, i64 %N) {
entry:
br label %next
next:
%cond = icmp eq i64 %N, 0
br i1 %cond, label %loop, label %merge
loop:
%indvar = phi i64 [0, %next], [%indvar.next, %loop]
%indvar.next = add i64 %indvar, 1
%sum = add i64 %N, 1
store float 4.0, float* %A
%cmp = icmp sle i64 %indvar.next, 100
br i1 %cmp, label %loop, label %merge
merge:
%res = phi i64 [%sum, %loop], [0, %next]
br label %exit
exit:
ret i64 %res
}