b5e1fc19da
We added a new post-isel CTRLoop pass in D122125. That pass will expand the hardware loop related intrinsic to CTR loop or normal loop based on the loop context. So we don't need to conservatively check the CTR clobber now on the IR level. Reviewed By: lkail Differential Revision: https://reviews.llvm.org/D135847
105 lines
4.4 KiB
LLVM
105 lines
4.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -hardware-loops -S -verify-loop-lcssa %s | FileCheck %s
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target datalayout = "E-m:e-i64:64-n32:64"
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target triple = "ppc64-unknown-linux-elf"
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declare i1 @cond() readnone
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; Make sure we do not crash on the test.
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define void @test() {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[WHILE_COND:%.*]]
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; CHECK: while.cond:
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: br label [[FOR_INC:%.*]]
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; CHECK: for.inc:
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; CHECK-NEXT: [[C_0:%.*]] = call i1 @cond()
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; CHECK-NEXT: br i1 [[C_0]], label [[WHILE_COND25_PREHEADER:%.*]], label [[FOR_BODY]]
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; CHECK: while.cond25.preheader:
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; CHECK-NEXT: call void @llvm.set.loop.iterations.i64(i64 51)
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; CHECK-NEXT: br label [[WHILE_COND25:%.*]]
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; CHECK: while.cond25:
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; CHECK-NEXT: [[INDVAR:%.*]] = phi i64 [ 0, [[WHILE_COND25_PREHEADER]] ], [ [[INDVAR_NEXT:%.*]], [[LAND_RHS:%.*]] ]
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; CHECK-NEXT: [[INDVARS_IV349:%.*]] = phi i64 [ [[INDVARS_IV_NEXT350:%.*]], [[LAND_RHS]] ], [ 50, [[WHILE_COND25_PREHEADER]] ]
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; CHECK-NEXT: [[TMP0:%.*]] = call i1 @llvm.loop.decrement.i64(i64 1)
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; CHECK-NEXT: br i1 [[TMP0]], label [[LAND_RHS]], label [[WHILE_END187:%.*]]
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; CHECK: land.rhs:
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; CHECK-NEXT: [[INDVARS_IV_NEXT350]] = add nsw i64 [[INDVARS_IV349]], -1
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; CHECK-NEXT: [[C_1:%.*]] = call i1 @cond()
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; CHECK-NEXT: [[INDVAR_NEXT]] = add i64 [[INDVAR]], 1
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; CHECK-NEXT: br i1 [[C_1]], label [[WHILE_COND25]], label [[WHILE_END:%.*]]
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; CHECK: while.end:
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; CHECK-NEXT: [[INDVAR_LCSSA1:%.*]] = phi i64 [ [[INDVAR]], [[LAND_RHS]] ]
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; CHECK-NEXT: [[C_2:%.*]] = call i1 @cond()
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; CHECK-NEXT: br i1 [[C_2]], label [[WHILE_END187]], label [[WHILE_COND35_PREHEADER:%.*]]
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; CHECK: while.cond35.preheader:
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; CHECK-NEXT: [[TMP1:%.*]] = mul nsw i64 [[INDVAR_LCSSA1]], -1
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; CHECK-NEXT: [[TMP2:%.*]] = add i64 [[TMP1]], 51
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; CHECK-NEXT: call void @llvm.set.loop.iterations.i64(i64 [[TMP2]])
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; CHECK-NEXT: br label [[WHILE_COND35:%.*]]
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; CHECK: while.cond35:
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; CHECK-NEXT: [[TMP3:%.*]] = call i1 @llvm.loop.decrement.i64(i64 1)
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; CHECK-NEXT: br i1 [[TMP3]], label [[LAND_RHS37:%.*]], label [[IF_END51:%.*]]
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; CHECK: land.rhs37:
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; CHECK-NEXT: br label [[WHILE_COND35]]
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; CHECK: if.end51:
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; CHECK-NEXT: br label [[WHILE_COND_BACKEDGE:%.*]]
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; CHECK: while.cond.backedge:
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; CHECK-NEXT: br label [[WHILE_COND]]
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; CHECK: while.end187:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %while.cond
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while.cond: ; preds = %while.cond.backedge, %entry
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br label %for.body
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for.body: ; preds = %for.inc, %while.cond
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br label %for.inc
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for.inc: ; preds = %for.body
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%c.0 = call i1 @cond()
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br i1 %c.0, label %while.cond25, label %for.body
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while.cond25: ; preds = %land.rhs, %for.inc
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%indvars.iv349 = phi i64 [ %indvars.iv.next350, %land.rhs ], [ 50, %for.inc ]
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%cmp26.not = icmp eq i64 %indvars.iv349, 0
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br i1 %cmp26.not, label %while.end187, label %land.rhs
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land.rhs: ; preds = %while.cond25
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%indvars.iv.next350 = add nsw i64 %indvars.iv349, -1
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%c.1 = call i1 @cond()
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br i1 %c.1, label %while.cond25, label %while.end
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while.end: ; preds = %land.rhs
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%c.2 = call i1 @cond()
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br i1 %c.2, label %while.end187, label %while.cond35.preheader
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while.cond35.preheader: ; preds = %while.end
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%0 = and i64 %indvars.iv349, 4294967295
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br label %while.cond35
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while.cond35: ; preds = %land.rhs37, %while.cond35.preheader
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%indvars.iv351 = phi i64 [ %0, %while.cond35.preheader ], [ %indvars.iv.next352, %land.rhs37 ]
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%cmp36 = icmp sgt i64 %indvars.iv351, 0
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br i1 %cmp36, label %land.rhs37, label %if.end51
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land.rhs37: ; preds = %while.cond35
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%indvars.iv.next352 = add nsw i64 %indvars.iv351, -1
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br label %while.cond35
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if.end51: ; preds = %while.cond35
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br label %while.cond.backedge
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while.cond.backedge: ; preds = %if.end51
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br label %while.cond
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while.end187: ; preds = %while.end, %while.cond25
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ret void
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}
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