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llvm-project/llvm/test/Transforms/IRCE/variable-loop-bounds.ll

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; RUN: opt -irce -S -verify-loop-info -irce-print-changed-loops -irce-skip-profitability-checks < %s 2>&1 | FileCheck %s
; CHECK: irce: in function test_inc_eq: constrained Loop at depth 1 containing: %for.body<header>,%if.else,%if.then,%for.inc<latch><exiting>
; CHECK: irce: in function test_inc_ne: constrained Loop at depth 1 containing: %for.body<header>,%if.else,%if.then,%for.inc<latch><exiting>
; CHECK: irce: in function test_inc_slt: constrained Loop at depth 1 containing: %for.body<header>,%if.else,%if.then,%for.inc<latch><exiting>
; CHECK: irce: in function test_inc_ult: constrained Loop at depth 1 containing: %for.body<header>,%if.else,%if.then,%for.inc<latch><exiting>
; CHECK: irce: in function signed_var_imm_dec_sgt: constrained Loop at depth 1 containing: %for.body<header>,%if.else,%for.inc<latch><exiting>
; CHECK-NOT: irce: in function signed_var_imm_dec_slt: constrained Loop at depth 1 containing: %for.body<header>,%if.else,%for.inc<latch><exiting>
; CHECK: irce: in function signed_var_imm_dec_sge: constrained Loop at depth 1 containing: %for.body<header>,%if.else,%for.inc<latch><exiting>
; CHECK: irce: in function signed_var_imm_dec_ne: constrained Loop at depth 1 containing: %for.body<header>,%if.else,%for.inc<latch><exiting>
; CHECK-NOT: irce: in function signed_var_imm_dec_eq: constrained Loop at depth 1 containing: %for.body<header>,%if.else,%for.inc<latch><exiting>
; CHECK-LABEL: test_inc_eq(
; CHECK: main.exit.selector:
; CHECK: [[PSEUDO_PHI:%[^ ]+]] = phi i32 [ %inc, %for.inc ]
; CHECK: [[COND:%[^ ]+]] = icmp ult i32 [[PSEUDO_PHI]], %N
; CHECK: br i1 [[COND]], label %main.pseudo.exit, label %for.cond.cleanup.loopexit
define void @test_inc_eq(i32* nocapture %a, i32* nocapture readonly %b, i32* nocapture readonly %c, i32 %N) {
entry:
%cmp16 = icmp sgt i32 %N, 0
br i1 %cmp16, label %for.body, label %for.cond.cleanup
for.cond.cleanup:
ret void
for.body:
%i.017 = phi i32 [ %inc, %for.inc ], [ 0, %entry ]
%cmp1 = icmp ult i32 %i.017, 512
%arrayidx = getelementptr inbounds i32, i32* %b, i32 %i.017
%0 = load i32, i32* %arrayidx, align 4
%arrayidx2 = getelementptr inbounds i32, i32* %c, i32 %i.017
%1 = load i32, i32* %arrayidx2, align 4
br i1 %cmp1, label %if.then, label %if.else
if.then:
%sub = sub i32 %0, %1
%arrayidx3 = getelementptr inbounds i32, i32* %a, i32 %i.017
%2 = load i32, i32* %arrayidx3, align 4
%add = add nsw i32 %sub, %2
store i32 %add, i32* %arrayidx3, align 4
br label %for.inc
if.else:
%add6 = add nsw i32 %1, %0
%arrayidx7 = getelementptr inbounds i32, i32* %a, i32 %i.017
store i32 %add6, i32* %arrayidx7, align 4
br label %for.inc
for.inc:
%inc = add nuw nsw i32 %i.017, 1
%exitcond = icmp eq i32 %inc, %N
br i1 %exitcond, label %for.cond.cleanup, label %for.body
}
; CHECK-LABEL: test_inc_ne
; CHECK: main.exit.selector:
; CHECK: [[PSEUDO_PHI:%[^ ]+]] = phi i32 [ %inc, %for.inc ]
; CHECK: [[COND:%[^ ]+]] = icmp ult i32 [[PSEUDO_PHI]], %N
; CHECK: br i1 [[COND]], label %main.pseudo.exit, label %for.cond.cleanup.loopexit
define void @test_inc_ne(i32* nocapture %a, i32* nocapture readonly %b, i32* nocapture readonly %c, i32 %N) {
entry:
%cmp16 = icmp sgt i32 %N, 0
br i1 %cmp16, label %for.body, label %for.cond.cleanup
for.cond.cleanup:
ret void
for.body:
%i.017 = phi i32 [ %inc, %for.inc ], [ 0, %entry ]
%cmp1 = icmp ult i32 %i.017, 512
%arrayidx = getelementptr inbounds i32, i32* %b, i32 %i.017
%0 = load i32, i32* %arrayidx, align 4
%arrayidx2 = getelementptr inbounds i32, i32* %c, i32 %i.017
%1 = load i32, i32* %arrayidx2, align 4
br i1 %cmp1, label %if.then, label %if.else
if.then:
%sub = sub i32 %0, %1
%arrayidx3 = getelementptr inbounds i32, i32* %a, i32 %i.017
%2 = load i32, i32* %arrayidx3, align 4
%add = add nsw i32 %sub, %2
store i32 %add, i32* %arrayidx3, align 4
br label %for.inc
if.else:
%add6 = add nsw i32 %1, %0
%arrayidx7 = getelementptr inbounds i32, i32* %a, i32 %i.017
store i32 %add6, i32* %arrayidx7, align 4
br label %for.inc
for.inc:
%inc = add nuw nsw i32 %i.017, 1
%exitcond = icmp ne i32 %inc, %N
br i1 %exitcond, label %for.body, label %for.cond.cleanup
}
; CHECK-LABEL: test_inc_slt(
; CHECK: main.exit.selector:
; CHECK: [[PSEUDO_PHI:%[^ ]+]] = phi i32 [ %inc, %for.inc ]
; CHECK: [[COND:%[^ ]+]] = icmp slt i32 [[PSEUDO_PHI]], %N
; CHECK: br i1 [[COND]], label %main.pseudo.exit, label %for.cond.cleanup.loopexit
define void @test_inc_slt(i32* nocapture %a, i32* nocapture readonly %b, i32* nocapture readonly %c, i32 %N) {
entry:
%cmp16 = icmp sgt i32 %N, 0
br i1 %cmp16, label %for.body, label %for.cond.cleanup
for.cond.cleanup:
ret void
for.body:
%i.017 = phi i32 [ %inc, %for.inc ], [ 0, %entry ]
%cmp1 = icmp ult i32 %i.017, 512
%arrayidx = getelementptr inbounds i32, i32* %b, i32 %i.017
%0 = load i32, i32* %arrayidx, align 4
%arrayidx2 = getelementptr inbounds i32, i32* %c, i32 %i.017
%1 = load i32, i32* %arrayidx2, align 4
br i1 %cmp1, label %if.then, label %if.else
if.then:
%sub = sub i32 %0, %1
%arrayidx3 = getelementptr inbounds i32, i32* %a, i32 %i.017
%2 = load i32, i32* %arrayidx3, align 4
%add = add nsw i32 %sub, %2
store i32 %add, i32* %arrayidx3, align 4
br label %for.inc
if.else:
%add6 = add nsw i32 %1, %0
%arrayidx7 = getelementptr inbounds i32, i32* %a, i32 %i.017
store i32 %add6, i32* %arrayidx7, align 4
br label %for.inc
for.inc:
%inc = add nuw nsw i32 %i.017, 1
%exitcond = icmp slt i32 %inc, %N
br i1 %exitcond, label %for.body, label %for.cond.cleanup
}
; CHECK-LABEL: test_inc_ult
; CHECK: main.exit.selector:
; CHECK: [[PSEUDO_PHI:%[^ ]+]] = phi i32 [ %inc, %for.inc ]
; CHECK: [[COND:%[^ ]+]] = icmp ult i32 [[PSEUDO_PHI]], %N
; CHECK: br i1 [[COND]], label %main.pseudo.exit, label %for.cond.cleanup.loopexit
define void @test_inc_ult(i32* nocapture %a, i32* nocapture readonly %b, i32* nocapture readonly %c, i32 %N) {
entry:
%cmp16 = icmp ugt i32 %N, 0
br i1 %cmp16, label %for.body, label %for.cond.cleanup
for.cond.cleanup:
ret void
for.body:
%i.017 = phi i32 [ %inc, %for.inc ], [ 0, %entry ]
%cmp1 = icmp ult i32 %i.017, 512
%arrayidx = getelementptr inbounds i32, i32* %b, i32 %i.017
%0 = load i32, i32* %arrayidx, align 4
%arrayidx2 = getelementptr inbounds i32, i32* %c, i32 %i.017
%1 = load i32, i32* %arrayidx2, align 4
br i1 %cmp1, label %if.then, label %if.else
if.then:
%sub = sub i32 %0, %1
%arrayidx3 = getelementptr inbounds i32, i32* %a, i32 %i.017
%2 = load i32, i32* %arrayidx3, align 4
%add = add nsw i32 %sub, %2
store i32 %add, i32* %arrayidx3, align 4
br label %for.inc
if.else:
%add6 = add nsw i32 %1, %0
%arrayidx7 = getelementptr inbounds i32, i32* %a, i32 %i.017
store i32 %add6, i32* %arrayidx7, align 4
br label %for.inc
for.inc:
%inc = add nuw nsw i32 %i.017, 1
%exitcond = icmp ult i32 %inc, %N
br i1 %exitcond, label %for.body, label %for.cond.cleanup
}
; CHECK-LABEL: signed_var_imm_dec_sgt(
; CHECK: main.exit.selector:
; CHECK: [[PSEUDO_PHI:%[^ ]+]] = phi i32 [ %dec, %for.inc ]
; CHECK: [[COND:%[^ ]+]] = icmp sgt i32 [[PSEUDO_PHI]], %M
; CHECK: br i1 [[COND]]
define void @signed_var_imm_dec_sgt(i32* nocapture %a, i32* nocapture readonly %b, i32* nocapture readonly %c, i32 %M) {
entry:
%cmp14 = icmp slt i32 %M, 1024
br i1 %cmp14, label %for.body, label %for.cond.cleanup
for.cond.cleanup: ; preds = %for.inc, %entry
ret void
for.body: ; preds = %entry, %for.inc
%iv = phi i32 [ %dec, %for.inc ], [ 1024, %entry ]
%cmp1 = icmp slt i32 %iv, 1024
%arrayidx = getelementptr inbounds i32, i32* %b, i32 %iv
%0 = load i32, i32* %arrayidx, align 4
%arrayidx2 = getelementptr inbounds i32, i32* %c, i32 %iv
%1 = load i32, i32* %arrayidx2, align 4
%mul = mul nsw i32 %1, %0
%arrayidx3 = getelementptr inbounds i32, i32* %a, i32 %iv
br i1 %cmp1, label %for.inc, label %if.else
if.else: ; preds = %for.body
%2 = load i32, i32* %arrayidx3, align 4
%add = add nsw i32 %2, %mul
br label %for.inc
for.inc: ; preds = %for.body, %if.else
%storemerge = phi i32 [ %add, %if.else ], [ %mul, %for.body ]
store i32 %storemerge, i32* %arrayidx3, align 4
%dec = add nsw i32 %iv, -1
%cmp = icmp sgt i32 %dec, %M
br i1 %cmp, label %for.body, label %for.cond.cleanup
}
; CHECK-LABEL: signed_var_imm_dec_sge(
; CHECK: main.exit.selector: ; preds = %for.inc
; CHECK: [[PSEUDO_PHI:%[^ ]+]] = phi i32 [ %iv, %for.inc ]
; CHECK: [[COND:%[^ ]+]] = icmp sgt i32 [[PSEUDO_PHI]], %M
; CHECK: br i1 [[COND]]
define void @signed_var_imm_dec_sge(i32* nocapture %a, i32* nocapture readonly %b, i32* nocapture readonly %c, i32 %M) {
entry:
%cmp14 = icmp sgt i32 %M, 1024
br i1 %cmp14, label %for.cond.cleanup, label %for.body
for.cond.cleanup: ; preds = %for.inc, %entry
ret void
for.body: ; preds = %entry, %for.inc
%iv = phi i32 [ %dec, %for.inc ], [ 1024, %entry ]
%cmp1 = icmp slt i32 %iv, 1024
%arrayidx = getelementptr inbounds i32, i32* %b, i32 %iv
%0 = load i32, i32* %arrayidx, align 4
%arrayidx2 = getelementptr inbounds i32, i32* %c, i32 %iv
%1 = load i32, i32* %arrayidx2, align 4
%mul = mul nsw i32 %1, %0
%arrayidx3 = getelementptr inbounds i32, i32* %a, i32 %iv
br i1 %cmp1, label %for.inc, label %if.else
if.else: ; preds = %for.body
%2 = load i32, i32* %arrayidx3, align 4
%add = add nsw i32 %2, %mul
br label %for.inc
for.inc: ; preds = %for.body, %if.else
%storemerge = phi i32 [ %add, %if.else ], [ %mul, %for.body ]
store i32 %storemerge, i32* %arrayidx3, align 4
%dec = add nsw i32 %iv, -1
%cmp = icmp sgt i32 %iv, %M
br i1 %cmp, label %for.body, label %for.cond.cleanup
}
define void @signed_var_imm_dec_slt(i32* nocapture %a, i32* nocapture readonly %b, i32* nocapture readonly %c, i32 %M) {
entry:
%cmp14 = icmp sgt i32 %M, 1024
br i1 %cmp14, label %for.cond.cleanup, label %for.body
for.cond.cleanup: ; preds = %for.inc, %entry
ret void
for.body: ; preds = %entry, %for.inc
%iv = phi i32 [ %dec, %for.inc ], [ 1024, %entry ]
%cmp1 = icmp slt i32 %iv, 1024
%arrayidx = getelementptr inbounds i32, i32* %b, i32 %iv
%0 = load i32, i32* %arrayidx, align 4
%arrayidx2 = getelementptr inbounds i32, i32* %c, i32 %iv
%1 = load i32, i32* %arrayidx2, align 4
%mul = mul nsw i32 %1, %0
%arrayidx3 = getelementptr inbounds i32, i32* %a, i32 %iv
br i1 %cmp1, label %for.inc, label %if.else
if.else: ; preds = %for.body
%2 = load i32, i32* %arrayidx3, align 4
%add = add nsw i32 %2, %mul
br label %for.inc
for.inc: ; preds = %for.body, %if.else
%storemerge = phi i32 [ %add, %if.else ], [ %mul, %for.body ]
store i32 %storemerge, i32* %arrayidx3, align 4
%dec = add nsw i32 %iv, -1
%cmp = icmp slt i32 %iv, %M
br i1 %cmp, label %for.cond.cleanup, label %for.body
}
; CHECK-LABEL: signed_var_imm_dec_ne(
; CHECK: main.exit.selector: ; preds = %for.inc
; CHECK: [[PSEUDO_PHI:%[^ ]+]] = phi i32 [ %dec, %for.inc ]
; CHECK: [[COND:%[^ ]+]] = icmp sgt i32 [[PSEUDO_PHI]], %M
; CHECK: br i1 [[COND]]
define void @signed_var_imm_dec_ne(i32* nocapture %a, i32* nocapture readonly %b, i32* nocapture readonly %c, i32 %M) {
entry:
%cmp14 = icmp slt i32 %M, 1024
br i1 %cmp14, label %for.body, label %for.cond.cleanup
for.cond.cleanup: ; preds = %for.inc, %entry
ret void
for.body: ; preds = %entry, %for.inc
%iv = phi i32 [ %dec, %for.inc ], [ 1024, %entry ]
%cmp1 = icmp slt i32 %iv, 1024
%arrayidx = getelementptr inbounds i32, i32* %b, i32 %iv
%0 = load i32, i32* %arrayidx, align 4
%arrayidx2 = getelementptr inbounds i32, i32* %c, i32 %iv
%1 = load i32, i32* %arrayidx2, align 4
%mul = mul nsw i32 %1, %0
%arrayidx3 = getelementptr inbounds i32, i32* %a, i32 %iv
br i1 %cmp1, label %for.inc, label %if.else
if.else: ; preds = %for.body
%2 = load i32, i32* %arrayidx3, align 4
%add = add nsw i32 %2, %mul
br label %for.inc
for.inc: ; preds = %for.body, %if.else
%storemerge = phi i32 [ %add, %if.else ], [ %mul, %for.body ]
store i32 %storemerge, i32* %arrayidx3, align 4
%dec = add nsw i32 %iv, -1
%cmp = icmp ne i32 %dec, %M
br i1 %cmp, label %for.body, label %for.cond.cleanup
}
define void @signed_var_imm_dec_eq(i32* nocapture %a, i32* nocapture readonly %b, i32* nocapture readonly %c, i32 %M) {
entry:
%cmp14 = icmp slt i32 %M, 1024
br i1 %cmp14, label %for.body, label %for.cond.cleanup
for.cond.cleanup: ; preds = %for.inc, %entry
ret void
for.body: ; preds = %entry, %for.inc
%iv = phi i32 [ %dec, %for.inc ], [ 1024, %entry ]
%cmp1 = icmp slt i32 %iv, 1024
%arrayidx = getelementptr inbounds i32, i32* %b, i32 %iv
%0 = load i32, i32* %arrayidx, align 4
%arrayidx2 = getelementptr inbounds i32, i32* %c, i32 %iv
%1 = load i32, i32* %arrayidx2, align 4
%mul = mul nsw i32 %1, %0
%arrayidx3 = getelementptr inbounds i32, i32* %a, i32 %iv
br i1 %cmp1, label %for.inc, label %if.else
if.else: ; preds = %for.body
%2 = load i32, i32* %arrayidx3, align 4
%add = add nsw i32 %2, %mul
br label %for.inc
for.inc: ; preds = %for.body, %if.else
%storemerge = phi i32 [ %add, %if.else ], [ %mul, %for.body ]
store i32 %storemerge, i32* %arrayidx3, align 4
%dec = add nsw i32 %iv, -1
%cmp = icmp eq i32 %dec, %M
br i1 %cmp, label %for.cond.cleanup, label %for.body
}
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