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TheRock/compiler/amd-llvm/llvm/test/Transforms/GVN/PRE/pre-load-in-loop.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

46 lines
1.2 KiB
LLVM

; RUN: opt < %s -passes='require<loops>,gvn' -enable-load-in-loop-pre=false -S | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
;void test1(int N, ptr G) {
; int j;
; for (j = 0; j < N - 1; j++)
; G[j] = G[j] + G[j+1];
;}
define void @test1(i32 %N, ptr nocapture %G) nounwind ssp {
; CHECK-LABEL: @test1(
entry:
%0 = add i32 %N, -1
%1 = icmp sgt i32 %0, 0
br i1 %1, label %bb.nph, label %return
bb.nph:
%tmp = zext i32 %0 to i64
br label %bb
; CHECK: bb.nph:
; CHECK-NOT: load double, ptr
; CHECK: br label %bb
bb:
%indvar = phi i64 [ 0, %bb.nph ], [ %tmp6, %bb ]
%tmp6 = add i64 %indvar, 1
%scevgep = getelementptr double, ptr %G, i64 %tmp6
%scevgep7 = getelementptr double, ptr %G, i64 %indvar
%2 = load double, ptr %scevgep7, align 8
%3 = load double, ptr %scevgep, align 8
%4 = fadd double %2, %3
store double %4, ptr %scevgep7, align 8
%exitcond = icmp eq i64 %tmp6, %tmp
br i1 %exitcond, label %return, label %bb
; Both loads should remain in the loop.
; CHECK: bb:
; CHECK: load double, ptr
; CHECK: load double, ptr
; CHECK: br i1 %exitcond
return:
ret void
}