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TheRock/compiler/amd-llvm/polly/test/ScopInfo/read-only-scalar-used-in-phi-2.ll
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derek.holloway 7502bf64a4
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Flatten subprojects into a single base monorepo
2026-09-02 16:34:47 -07:00

37 lines
1015 B
LLVM

; RUN: opt %loadNPMPolly '-passes=polly-custom<scops>' -polly-print-scops -disable-output < %s 2>&1 | FileCheck %s
;
; float foo(float sum, float A[]) {
;
; for (long i = 0; i < 100; i++)
; sum += A[i];
;
; return sum;
; }
; Verify that we do not model the read from %sum. Reads that only happen in
; case control flow reaches the PHI node from outside the SCoP are handled
; implicitly during code generation.
; CHECK: Stmt_bb1[i0] -> MemRef_phisum__ph
; CHECK-NOT: Stmt_bb1[i0] -> MemRef_sum[]
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
define float @foo(float %sum, ptr %A) {
bb:
br label %bb1
bb1:
%i = phi i64 [ 0, %bb ], [ %i.next, %bb1 ]
%phisum = phi float [ %sum, %bb ], [ %tmp5, %bb1 ]
%tmp = getelementptr inbounds float, ptr %A, i64 %i
%tmp4 = load float, ptr %tmp, align 4
%tmp5 = fadd float %phisum, %tmp4
%i.next = add nuw nsw i64 %i, 1
%exitcond = icmp ne i64 %i, 100
br i1 %exitcond, label %bb1, label %bb7
bb7:
ret float %phisum
}