e0cc556ad4
This prevents us from ending up with (zext (sext X)). The zext will require an instruction on targets where zext isn't free like RISC-V.
67 lines
2.9 KiB
LLVM
67 lines
2.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt < %s -passes=indvars -S | FileCheck %s
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target datalayout = "e-m:e-p:64:64-i64:64-i128:128-n32:64-S128"
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target triple = "riscv64"
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define void @foo(ptr %x, i32 %n) {
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; CHECK-LABEL: define void @foo(
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; CHECK-SAME: ptr [[X:%.*]], i32 [[N:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: [[CMP10:%.*]] = icmp sgt i32 [[N]], 0
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; CHECK-NEXT: br i1 [[CMP10]], label %[[FOR_BODY_PREHEADER:.*]], label %[[FOR_COND_CLEANUP:.*]]
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; CHECK: [[FOR_BODY_PREHEADER]]:
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; CHECK-NEXT: [[WIDE_TRIP_COUNT:%.*]] = zext i32 [[N]] to i64
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; CHECK-NEXT: br label %[[FOR_BODY:.*]]
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; CHECK: [[FOR_COND_CLEANUP_LOOPEXIT:.*]]:
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; CHECK-NEXT: br label %[[FOR_COND_CLEANUP]]
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; CHECK: [[FOR_COND_CLEANUP]]:
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; CHECK-NEXT: ret void
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; CHECK: [[FOR_BODY]]:
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; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], %[[FOR_INC:.*]] ], [ 0, %[[FOR_BODY_PREHEADER]] ]
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; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds nuw i16, ptr [[X]], i64 [[INDVARS_IV]]
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; CHECK-NEXT: [[TMP0:%.*]] = load i16, ptr [[ARRAYIDX]], align 2
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; CHECK-NEXT: [[CONV:%.*]] = sext i16 [[TMP0]] to i32
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; CHECK-NEXT: [[TMP1:%.*]] = sext i32 [[CONV]] to i64
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; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i64 [[INDVARS_IV]], [[TMP1]]
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; CHECK-NEXT: br i1 [[CMP1]], label %[[IF_THEN:.*]], label %[[FOR_INC]]
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; CHECK: [[IF_THEN]]:
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; CHECK-NEXT: store i16 0, ptr [[ARRAYIDX]], align 2
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; CHECK-NEXT: br label %[[FOR_INC]]
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; CHECK: [[FOR_INC]]:
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; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
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; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], [[WIDE_TRIP_COUNT]]
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; CHECK-NEXT: br i1 [[EXITCOND]], label %[[FOR_BODY]], label %[[FOR_COND_CLEANUP_LOOPEXIT]]
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;
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entry:
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%cmp10 = icmp sgt i32 %n, 0
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br i1 %cmp10, label %for.body.preheader, label %for.cond.cleanup
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for.body.preheader: ; preds = %entry
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br label %for.body
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for.cond.cleanup.loopexit: ; preds = %for.inc
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br label %for.cond.cleanup
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for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry
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ret void
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for.body: ; preds = %for.body.preheader, %for.inc
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%i.011 = phi i32 [ %inc, %for.inc ], [ 0, %for.body.preheader ]
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%idxprom = zext nneg i32 %i.011 to i64
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%arrayidx = getelementptr inbounds nuw i16, ptr %x, i64 %idxprom
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%0 = load i16, ptr %arrayidx, align 2
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%conv = sext i16 %0 to i32
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%cmp1 = icmp eq i32 %i.011, %conv
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br i1 %cmp1, label %if.then, label %for.inc
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if.then: ; preds = %for.body
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store i16 0, ptr %arrayidx, align 2
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br label %for.inc
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for.inc: ; preds = %for.body, %if.then
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%inc = add nuw nsw i32 %i.011, 1
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%cmp = icmp slt i32 %inc, %n
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br i1 %cmp, label %for.body, label %for.cond.cleanup.loopexit
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}
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