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[AArch64TTI] Compute imm materialization cost for AArch64 intrinsics
Currently, getIntImmCost returns TCC_Free for almost all intrinsics. For most AArch64 specific intrinsics however, it looks like integer constants cannot be folded into most of them (at least the ones I checked). Unless we know that we can fold integer operands with the intrinsic, we handle more cases correctly by returning the cost to materialize the immediate than return TCC_Free. Reviewers: SjoerdMeijer, dmgreen, t.p.northover, ributzka Reviewed By: SjoerdMeijer Differential Revision: https://reviews.llvm.org/D70669
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llvm/test/Transforms/ConstantHoisting/AArch64/const-hoist-intrinsics.ll
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py | ||
; RUN: opt -mtriple=arm64-darwin-unknown -S -consthoist < %s | FileCheck %s | ||
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; Make sure we hoist constants out of intrinsics. | ||
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define void @test_stxr(i64* %ptr) { | ||
; CHECK-LABEL: @test_stxr( | ||
; CHECK-NEXT: entry: | ||
; CHECK-NEXT: [[CONST:%.*]] = bitcast i64 -9223372036317904832 to i64 | ||
; CHECK-NEXT: [[PTR_0:%.*]] = getelementptr i64, i64* [[PTR:%.*]], i64 0 | ||
; CHECK-NEXT: [[CONST_MAT:%.*]] = add i64 [[CONST]], -64 | ||
; CHECK-NEXT: [[BAR_0:%.*]] = call i32 @llvm.aarch64.stxr.p0i64(i64 [[CONST_MAT]], i64* [[PTR_0]]) | ||
; CHECK-NEXT: [[PTR_1:%.*]] = getelementptr i64, i64* [[PTR]], i64 1 | ||
; CHECK-NEXT: [[BAR_1:%.*]] = call i32 @llvm.aarch64.stxr.p0i64(i64 [[CONST]], i64* [[PTR_1]]) | ||
; CHECK-NEXT: [[PTR_2:%.*]] = getelementptr i64, i64* [[PTR]], i64 2 | ||
; CHECK-NEXT: [[CONST_MAT1:%.*]] = add i64 [[CONST]], 64 | ||
; CHECK-NEXT: [[BAR_2:%.*]] = call i32 @llvm.aarch64.stxr.p0i64(i64 [[CONST_MAT1]], i64* [[PTR_2]]) | ||
; CHECK-NEXT: [[PTR_3:%.*]] = getelementptr i64, i64* [[PTR]], i64 3 | ||
; CHECK-NEXT: [[CONST_MAT2:%.*]] = add i64 [[CONST]], 128 | ||
; CHECK-NEXT: [[BAR_3:%.*]] = call i32 @llvm.aarch64.stxr.p0i64(i64 [[CONST_MAT2]], i64* [[PTR_3]]) | ||
; CHECK-NEXT: ret void | ||
; | ||
entry: | ||
%ptr.0 = getelementptr i64, i64* %ptr, i64 0 | ||
%bar.0 = call i32 @llvm.aarch64.stxr.p0i64(i64 -9223372036317904896, i64* %ptr.0) | ||
%ptr.1 = getelementptr i64, i64* %ptr, i64 1 | ||
%bar.1 = call i32 @llvm.aarch64.stxr.p0i64(i64 -9223372036317904832, i64* %ptr.1) | ||
%ptr.2 = getelementptr i64, i64* %ptr, i64 2 | ||
%bar.2 = call i32 @llvm.aarch64.stxr.p0i64(i64 -9223372036317904768, i64* %ptr.2) | ||
%ptr.3 = getelementptr i64, i64* %ptr, i64 3 | ||
%bar.3 = call i32 @llvm.aarch64.stxr.p0i64(i64 -9223372036317904704, i64* %ptr.3) | ||
ret void | ||
} | ||
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declare i32 @llvm.aarch64.stxr.p0i64(i64 , i64*) | ||
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define i64 @test_udiv(i64 %x) { | ||
; CHECK-LABEL: @test_udiv( | ||
; CHECK-NEXT: entry: | ||
; CHECK-NEXT: [[CONST:%.*]] = bitcast i64 -9223372036317904832 to i64 | ||
; CHECK-NEXT: [[CONST_MAT:%.*]] = add i64 [[CONST]], -64 | ||
; CHECK-NEXT: [[BAR_0:%.*]] = call i64 @llvm.aarch64.udiv.i64(i64 [[CONST_MAT]], i64 [[X:%.*]]) | ||
; CHECK-NEXT: [[BAR_1:%.*]] = call i64 @llvm.aarch64.udiv.i64(i64 [[CONST]], i64 [[X]]) | ||
; CHECK-NEXT: [[CONST_MAT1:%.*]] = add i64 [[CONST]], 64 | ||
; CHECK-NEXT: [[BAR_2:%.*]] = call i64 @llvm.aarch64.udiv.i64(i64 [[CONST_MAT1]], i64 [[X]]) | ||
; CHECK-NEXT: [[CONST_MAT2:%.*]] = add i64 [[CONST]], 128 | ||
; CHECK-NEXT: [[BAR_3:%.*]] = call i64 @llvm.aarch64.udiv.i64(i64 [[CONST_MAT2]], i64 [[X]]) | ||
; CHECK-NEXT: [[RES_1:%.*]] = add i64 [[BAR_0]], [[BAR_1]] | ||
; CHECK-NEXT: [[RES_2:%.*]] = add i64 [[RES_1]], [[BAR_2]] | ||
; CHECK-NEXT: [[RES_3:%.*]] = add i64 [[RES_2]], [[BAR_3]] | ||
; CHECK-NEXT: ret i64 [[RES_3]] | ||
; | ||
entry: | ||
%bar.0 = call i64 @llvm.aarch64.udiv.i64.i64(i64 -9223372036317904896, i64 %x) | ||
%bar.1 = call i64 @llvm.aarch64.udiv.i64.i64(i64 -9223372036317904832, i64 %x) | ||
%bar.2 = call i64 @llvm.aarch64.udiv.i64.i64(i64 -9223372036317904768, i64 %x) | ||
%bar.3 = call i64 @llvm.aarch64.udiv.i64.i64(i64 -9223372036317904704, i64 %x) | ||
%res.1 = add i64 %bar.0, %bar.1 | ||
%res.2 = add i64 %res.1, %bar.2 | ||
%res.3 = add i64 %res.2, %bar.3 | ||
ret i64 %res.3 | ||
} | ||
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declare i64 @llvm.aarch64.udiv.i64.i64(i64, i64) | ||
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define void @test_free_intrinsics(i64 %x, i8* %ptr) { | ||
; CHECK-LABEL: @test_free_intrinsics( | ||
; CHECK-NEXT: entry: | ||
; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 100000000032, i8* [[PTR:%.*]]) | ||
; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 100000000064, i8* [[PTR]]) | ||
; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 100000000128, i8* [[PTR]]) | ||
; CHECK-NEXT: [[I:%.*]] = call {}* @llvm.invariant.start.p0i8(i64 100000000256, i8* [[PTR]]) | ||
; CHECK-NEXT: call void @llvm.invariant.end.p0i8({}* [[I]], i64 100000000256, i8* [[PTR]]) | ||
; CHECK-NEXT: ret void | ||
; | ||
entry: | ||
call void @llvm.lifetime.start.p0i8(i64 100000000032, i8* %ptr) | ||
call void @llvm.lifetime.start.p0i8(i64 100000000064, i8* %ptr) | ||
call void @llvm.lifetime.end.p0i8(i64 100000000128, i8* %ptr) | ||
%i = call {}* @llvm.invariant.start.p0i8(i64 100000000256, i8* %ptr) | ||
call void @llvm.invariant.end.p0i8({}* %i, i64 100000000256, i8* %ptr) | ||
ret void | ||
} | ||
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declare void @llvm.lifetime.start.p0i8(i64, i8*) | ||
declare void @llvm.lifetime.end.p0i8(i64, i8*) | ||
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declare {}* @llvm.invariant.start.p0i8(i64, i8* nocapture) | ||
declare void @llvm.invariant.end.p0i8({}*, i64, i8* nocapture) |