72 lines
3.3 KiB
LLVM
72 lines
3.3 KiB
LLVM
target datalayout = "e-m:e-i64:64-n32:64"
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target triple = "powerpc64le-unknown-linux-gnu"
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; This file mainly tests the case that the two input registers of the ISEL instruction are the same register.
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; The foldable ISEL in this test case is introduced at simple register coalescing stage.
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; Before that stage we have:
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; %vreg18<def> = ISEL8 %vreg5, %vreg2, %vreg15<undef>;
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; At simple register coalescing stage, the register coalescer figures out it could remove the copy
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; from %vreg2 to %vreg5, put the original value %X3 into %vreg5 directly
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; erased: 336r %vreg5<def> = COPY %vreg2
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; updated: 288B %vreg5<def> = COPY %X3;
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; After that we have:
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; updated: 416B %vreg18<def> = ISEL8 %vreg5, %vreg5, %vreg15<undef>;
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; RUN: llc -verify-machineinstrs -O2 -ppc-asm-full-reg-names -mcpu=pwr7 -ppc-gen-isel=true < %s | FileCheck %s --check-prefix=CHECK-GEN-ISEL-TRUE
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; RUN: llc -verify-machineinstrs -O2 -ppc-asm-full-reg-names -mcpu=pwr7 -ppc-gen-isel=false < %s | FileCheck %s --implicit-check-not isel
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%"struct.pov::ot_block_struct" = type { %"struct.pov::ot_block_struct"*, [3 x double], [3 x double], float, float, float, float, float, float, float, float, float, [3 x float], float, float, [3 x double], i16 }
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%"struct.pov::ot_node_struct" = type { %"struct.pov::ot_id_struct", %"struct.pov::ot_block_struct"*, [8 x %"struct.pov::ot_node_struct"*] }
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%"struct.pov::ot_id_struct" = type { i32, i32, i32, i32 }
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define void @_ZN3pov6ot_insEPPNS_14ot_node_structEPNS_15ot_block_structEPNS_12ot_id_structE(%"struct.pov::ot_block_struct"* %new_block) {
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; CHECK-GEN-ISEL-TRUE-LABEL: _ZN3pov6ot_insEPPNS_14ot_node_structEPNS_15ot_block_structEPNS_12ot_id_structE:
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; Note: the following line fold the original isel (isel r4, r3, r3)
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; CHECK-GEN-ISEL-TRUE: mr r4, r3
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; CHECK-GEN-ISEL-TRUE: isel r29, r5, r6, 4*cr5+lt
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; CHECK-GEN-ISEL-TRUE: blr
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;
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; CHECK-LABEL: _ZN3pov6ot_insEPPNS_14ot_node_structEPNS_15ot_block_structEPNS_12ot_id_structE:
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; CHECK: mr r4, r3
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; CHECK: bc 12, 4*cr5+lt, .LBB0_3
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; CHECK: # %bb.2:
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; CHECK: ori r29, r6, 0
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; CHECK: b .LBB0_4
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; CHECK: .LBB0_3:
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; CHECK: addi r29, r5, 0
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; CHECK: .LBB0_4:
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; CHECK: blr
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entry:
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br label %while.cond11
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while.cond11:
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%this_node.0250 = phi %"struct.pov::ot_node_struct"* [ undef, %entry ], [ %1, %cond.false21.i156 ], [ %1, %cond.true18.i153 ]
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%temp_id.sroa.21.1 = phi i32 [ undef, %entry ], [ %shr2039.i152, %cond.true18.i153 ], [ %div24.i155, %cond.false21.i156 ]
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%0 = load i32, i32* undef, align 4
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%cmp17 = icmp eq i32 0, %0
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br i1 %cmp17, label %lor.rhs, label %while.body21
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lor.rhs:
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%Values = getelementptr inbounds %"struct.pov::ot_node_struct", %"struct.pov::ot_node_struct"* %this_node.0250, i64 0, i32 1
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store %"struct.pov::ot_block_struct"* %new_block, %"struct.pov::ot_block_struct"** %Values, align 8
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ret void
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while.body21:
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%call.i84 = tail call i8* @ZN3pov10pov_callocEmmPKciS1_pov()
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store i8* %call.i84, i8** undef, align 8
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%1 = bitcast i8* %call.i84 to %"struct.pov::ot_node_struct"*
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br i1 undef, label %cond.true18.i153, label %cond.false21.i156
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cond.true18.i153:
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%shr2039.i152 = lshr i32 %temp_id.sroa.21.1, 1
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br label %while.cond11
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cond.false21.i156:
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%add23.i154 = add nsw i32 %temp_id.sroa.21.1, 1
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%div24.i155 = sdiv i32 %add23.i154, 2
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br label %while.cond11
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}
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declare i8* @ZN3pov10pov_callocEmmPKciS1_pov()
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