non-affine-phi-node-expansion-4.ll
1.51 KB
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; RUN: opt %loadPolly -polly-codegen \
; RUN: -S < %s | FileCheck %s
define void @foo(float* %A, i1 %cond0, i1 %cond1) {
entry:
br label %loop
loop:
%indvar = phi i64 [0, %entry], [%indvar.next, %backedge]
%val0 = fadd float 1.0, 2.0
%val1 = fadd float 1.0, 2.0
br i1 %cond0, label %branch1, label %backedge
; CHECK-LABEL: polly.stmt.loop:
; CHECK-NEXT: %p_val0 = fadd float 1.000000e+00, 2.000000e+00
; CHECK-NEXT: %p_val1 = fadd float 1.000000e+00, 2.000000e+00
; CHECK-NEXT: br i1
; The interesting instruction here is %val2, which does not dominate the exit of
; the non-affine region. Care needs to be taken when code-generating this write.
; Specifically, at some point we modeled this scalar write, which we tried to
; code generate in the exit block of the non-affine region.
branch1:
%val2 = fadd float 1.0, 2.0
br i1 %cond1, label %branch2, label %backedge
; CHECK-LABEL: polly.stmt.branch1:
; CHECK-NEXT: %p_val2 = fadd float 1.000000e+00, 2.000000e+00
; CHECK-NEXT: br i1
branch2:
br label %backedge
; CHECK-LABEL: polly.stmt.branch2:
; CHECK-NEXT: br label
; CHECK-LABEL: polly.stmt.backedge.exit:
; CHECK: %polly.merge = phi float [ %p_val0, %polly.stmt.loop ], [ %p_val1, %polly.stmt.branch1 ], [ %p_val2, %polly.stmt.branch2 ]
backedge:
%merge = phi float [%val0, %loop], [%val1, %branch1], [%val2, %branch2]
%indvar.next = add i64 %indvar, 1
store float %merge, float* %A
%cmp = icmp sle i64 %indvar.next, 100
br i1 %cmp, label %loop, label %exit
exit:
ret void
}