forked from OSchip/llvm-project
193 lines
4.8 KiB
LLVM
193 lines
4.8 KiB
LLVM
; RUN: opt < %s -indvars -S | FileCheck %s
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target triple = "aarch64--linux-gnu"
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; Check the loop exit i32 compare instruction and operand are widened to i64
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; instead of truncating IV before its use in the i32 compare instruction.
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@idx = common global i32 0, align 4
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@e = common global i32 0, align 4
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@ptr = common global i32* null, align 8
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; CHECK-LABEL: @test1
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; CHECK: for.body.lr.ph:
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; CHECK: sext i32
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; CHECK: for.cond:
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; CHECK: icmp slt i64
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; CHECK: for.body:
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; CHECK: phi i64
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define i32 @test1() {
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entry:
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store i32 -1, i32* @idx, align 4
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%0 = load i32* @e, align 4
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%cmp4 = icmp slt i32 %0, 0
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br i1 %cmp4, label %for.end.loopexit, label %for.body.lr.ph
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for.body.lr.ph:
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%1 = load i32** @ptr, align 8
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%2 = load i32* @e, align 4
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br label %for.body
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for.cond:
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%inc = add nsw i32 %i.05, 1
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%cmp = icmp slt i32 %i.05, %2
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br i1 %cmp, label %for.body, label %for.cond.for.end.loopexit_crit_edge
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for.body:
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%i.05 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.cond ]
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%idxprom = sext i32 %i.05 to i64
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%arrayidx = getelementptr inbounds i32* %1, i64 %idxprom
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%3 = load i32* %arrayidx, align 4
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%tobool = icmp eq i32 %3, 0
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br i1 %tobool, label %if.then, label %for.cond
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if.then:
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%i.05.lcssa = phi i32 [ %i.05, %for.body ]
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store i32 %i.05.lcssa, i32* @idx, align 4
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br label %for.end
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for.cond.for.end.loopexit_crit_edge:
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br label %for.end.loopexit
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for.end.loopexit:
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br label %for.end
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for.end:
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%4 = load i32* @idx, align 4
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ret i32 %4
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}
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; CHECK-LABEL: @test2
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; CHECK: for.body4.us
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; CHECK: %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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; CHECK: %cmp2.us = icmp slt i64
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; CHECK-NOT: %2 = trunc i64 %indvars.iv.next to i32
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; CHECK-NOT: %cmp2.us = icmp slt i32
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define void @test2([8 x i8]* %a, i8* %b, i8 %limit) {
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entry:
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%conv = zext i8 %limit to i32
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%cmp23 = icmp eq i8 %limit, 0
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br i1 %cmp23, label %for.cond1.preheader, label %for.cond1.preheader.us
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for.cond1.preheader.us:
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%storemerge5.us = phi i32 [ 0, %entry ], [ %inc14.us, %for.inc13.us ]
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br i1 true, label %for.body4.lr.ph.us, label %for.inc13.us
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for.inc13.us:
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%inc14.us = add nsw i32 %storemerge5.us, 1
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%cmp.us = icmp slt i32 %inc14.us, 4
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br i1 %cmp.us, label %for.cond1.preheader.us, label %for.end
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for.body4.us:
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%storemerge14.us = phi i32 [ 0, %for.body4.lr.ph.us ], [ %inc.us, %for.body4.us ]
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%idxprom.us = sext i32 %storemerge14.us to i64
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%arrayidx6.us = getelementptr inbounds [8 x i8]* %a, i64 %idxprom5.us, i64 %idxprom.us
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%0 = load i8* %arrayidx6.us, align 1
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%idxprom7.us = zext i8 %0 to i64
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%arrayidx8.us = getelementptr inbounds i8* %b, i64 %idxprom7.us
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%1 = load i8* %arrayidx8.us, align 1
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store i8 %1, i8* %arrayidx6.us, align 1
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%inc.us = add nsw i32 %storemerge14.us, 1
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%cmp2.us = icmp slt i32 %inc.us, %conv
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br i1 %cmp2.us, label %for.body4.us, label %for.inc13.us
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for.body4.lr.ph.us:
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%idxprom5.us = sext i32 %storemerge5.us to i64
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br label %for.body4.us
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for.cond1.preheader:
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%storemerge5 = phi i32 [ 0, %entry ], [ %inc14, %for.inc13 ]
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br i1 false, label %for.inc13, label %for.inc13
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for.inc13:
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%inc14 = add nsw i32 %storemerge5, 1
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%cmp = icmp slt i32 %inc14, 4
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br i1 %cmp, label %for.cond1.preheader, label %for.end
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for.end:
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ret void
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}
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; CHECK-LABEL: @test3
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; CHECK: sext i32 %b
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; CHECK: for.cond:
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; CHECK: phi i64
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; CHECK: icmp slt i64
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define i32 @test3(i32* %a, i32 %b) {
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entry:
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br label %for.cond
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for.cond:
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%sum.0 = phi i32 [ 0, %entry ], [ %add, %for.body ]
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%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%cmp = icmp slt i32 %i.0, %b
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br i1 %cmp, label %for.body, label %for.end
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for.body:
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%idxprom = sext i32 %i.0 to i64
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%arrayidx = getelementptr inbounds i32* %a, i64 %idxprom
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%0 = load i32* %arrayidx, align 4
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%add = add nsw i32 %sum.0, %0
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%inc = add nsw i32 %i.0, 1
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br label %for.cond
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for.end:
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ret i32 %sum.0
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}
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declare i32 @fn1(i8 signext)
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; PR21030
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; CHECK-LABEL: @test4
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; CHECK: for.body:
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; CHECK: phi i32
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; CHECK: icmp sgt i8
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define i32 @test4(i32 %a) {
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entry:
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br label %for.body
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for.body:
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%c.07 = phi i8 [ -3, %entry ], [ %dec, %for.body ]
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%conv6 = zext i8 %c.07 to i32
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%or = or i32 %a, %conv6
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%conv3 = trunc i32 %or to i8
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%call = call i32 @fn1(i8 signext %conv3)
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%dec = add i8 %c.07, -1
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%cmp = icmp sgt i8 %dec, -14
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br i1 %cmp, label %for.body, label %for.end
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for.end:
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ret i32 0
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}
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; CHECK-LABEL: @test5
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; CHECK: zext i32 %b
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; CHECK: for.cond:
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; CHECK: phi i64
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; CHECK: icmp ule i64
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define i32 @test5(i32* %a, i32 %b) {
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entry:
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br label %for.cond
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for.cond:
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%sum.0 = phi i32 [ 0, %entry ], [ %add, %for.body ]
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%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%cmp = icmp ule i32 %i.0, %b
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br i1 %cmp, label %for.body, label %for.end
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for.body:
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%idxprom = zext i32 %i.0 to i64
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%arrayidx = getelementptr inbounds i32* %a, i64 %idxprom
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%0 = load i32* %arrayidx, align 4
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%add = add nsw i32 %sum.0, %0
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%inc = add nsw i32 %i.0, 1
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br label %for.cond
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for.end:
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ret i32 %sum.0
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}
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