caio/clang-p2996
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clang-p2996/llvm/test/CodeGen/Hexagon/order-stack-object.ll
Ikhlas Ajbar 76e3759d8d [Hexagon] Order objects on the stack by their alignments (#81280) 
This patch sorts stack objects by their alignment value from the largest
to the smallest. If two objects have the same alignment, then they are
sorted by their size from the largest to the smallest. This minimizes
padding and reduces run time stack size.
2024-02-10 14:42:50 -06:00

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LLVM
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; RUN: llc -march=hexagon -mattr=+hvxv68,+hvx-length128b < %s | FileCheck %s
; Check that ordering objects on the stack from the largest to the smallest has
; decreased the space allocated on the stack by 512 Bytes.
; CHECK: allocframe(r29,#2432):raw
define void @test(ptr nocapture readonly %arg, ptr nocapture writeonly %arg1, i32 %arg2) local_unnamed_addr {
bb:
%shl = shl i32 %arg2, 5
br label %bb3
bb3:
%phi = phi i32 [ 0, %bb ], [ %add13, %bb3 ]
%add = add i32 %phi, %shl
%sext = sext i32 %add to i64
%getelementptr = getelementptr float, ptr %arg, i64 %sext
%load = load <32 x float>, ptr %getelementptr, align 4
%fmul = fmul <32 x float> %load, <float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01, float 5.000000e-01>
%fmul4 = fmul <32 x float> %load, <float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000, float 0x3FE9884620000000>
%fmul5 = fmul <32 x float> %load, <float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000, float 0x3FA2444180000000>
%fmul6 = fmul <32 x float> %load, %fmul5
%fmul7 = fmul <32 x float> %load, %fmul6
%fadd = fadd <32 x float> %fmul4, %fmul7
%fmul8 = fmul <32 x float> %fadd, <float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00, float -2.000000e+00>
%call = tail call <32 x float> @llvm.exp.v32f32(<32 x float> %fmul8)
%fsub = fsub <32 x float> <float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00>, %call
%fadd9 = fadd <32 x float> %call, <float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00>
%fdiv = fdiv <32 x float> %fsub, %fadd9
%fadd10 = fadd <32 x float> %fdiv, <float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00>
%fmul11 = fmul <32 x float> %fmul, %fadd10
%getelementptr12 = getelementptr float, ptr %arg1, i64 %sext
store <32 x float> %fmul11, ptr %getelementptr12, align 128
%add13 = add nuw nsw i32 %phi, 128
%icmp = icmp ult i32 %phi, 8064
br i1 %icmp, label %bb3, label %bb14
bb14:
ret void
}
declare <32 x float> @llvm.exp.v32f32(<32 x float>)
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