[llvm] [RegisterCoalescer] Prune live range of early-clobber from live-in (PR #157628)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,75 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
+; RUN: llc -O1 -mtriple=riscv64 -mattr=+v < %s | FileCheck %s
+
+define i32 @main(i64 %0, i32 %a.promoted49.i, i1 %tobool.not.us.i.4, i1 %tobool.not.us.i.1.4, i1 %tobool.not.us.i.2.4) {
+; CHECK-LABEL: main:
+; CHECK:       # %bb.0: # %for.body.us.preheader.i
+; CHECK-NEXT:    andi a3, a3, 1
+; CHECK-NEXT:    andi a5, a2, 1
+; CHECK-NEXT:    vsetivli zero, 4, e64, m2, ta, ma
+; CHECK-NEXT:    vmv.v.x v8, a0
+; CHECK-NEXT:    vsetvli zero, zero, e64, m2, tu, ma
+; CHECK-NEXT:    vmv.s.x v8, zero
+; CHECK-NEXT:    vsetivli zero, 1, e8, mf8, ta, ma
+; CHECK-NEXT:    vmv.v.i v0, 14
+; CHECK-NEXT:    mv a2, a1
+; CHECK-NEXT:    bnez a5, .LBB0_2
+; CHECK-NEXT:  # %bb.1: # %for.body.us.preheader.i
+; CHECK-NEXT:    li a2, 1
+; CHECK-NEXT:  .LBB0_2: # %for.body.us.preheader.i
+; CHECK-NEXT:    vsetivli zero, 4, e64, m2, ta, ma
+; CHECK-NEXT:    vmerge.vxm v8, v8, a0, v0
+; CHECK-NEXT:    andi a4, a4, 1
+; CHECK-NEXT:    mv a0, a1
+; CHECK-NEXT:    bnez a3, .LBB0_4
+; CHECK-NEXT:  # %bb.3: # %for.body.us.preheader.i
+; CHECK-NEXT:    li a0, 1
+; CHECK-NEXT:  .LBB0_4: # %for.body.us.preheader.i
+; CHECK-NEXT:    vmsle.vi v0, v8, 0
+; CHECK-NEXT:    sext.w a2, a2
+; CHECK-NEXT:    bnez a4, .LBB0_6
+; CHECK-NEXT:  # %bb.5: # %for.body.us.preheader.i
+; CHECK-NEXT:    li a1, 1
+; CHECK-NEXT:  .LBB0_6: # %for.body.us.preheader.i
+; CHECK-NEXT:    sext.w a0, a0
+; CHECK-NEXT:    vsetvli zero, zero, e32, m1, ta, ma
+; CHECK-NEXT:    vmv.v.i v8, 0
+; CHECK-NEXT:    vmerge.vim v8, v8, 1, v0
+; CHECK-NEXT:    vsetivli zero, 8, e32, m2, ta, ma
+; CHECK-NEXT:    vredmin.vs v8, v8, v8
+; CHECK-NEXT:    vmv.x.s a3, v8
+; CHECK-NEXT:    sext.w a1, a1
+; CHECK-NEXT:    bge a3, a2, .LBB0_11
+; CHECK-NEXT:  # %bb.7: # %for.body.us.preheader.i
+; CHECK-NEXT:    bge a0, a1, .LBB0_12
+; CHECK-NEXT:  .LBB0_8: # %for.body.us.preheader.i
+; CHECK-NEXT:    blt a3, a0, .LBB0_10
+; CHECK-NEXT:  .LBB0_9: # %for.body.us.preheader.i
+; CHECK-NEXT:    mv a3, a0
+; CHECK-NEXT:  .LBB0_10: # %for.body.us.preheader.i
+; CHECK-NEXT:    sw a3, 0(zero)
+; CHECK-NEXT:    li a0, 0
+; CHECK-NEXT:    ret
+; CHECK-NEXT:  .LBB0_11: # %for.body.us.preheader.i
+; CHECK-NEXT:    mv a3, a2
+; CHECK-NEXT:    blt a0, a1, .LBB0_8
+; CHECK-NEXT:  .LBB0_12: # %for.body.us.preheader.i
+; CHECK-NEXT:    mv a0, a1
+; CHECK-NEXT:    bge a3, a0, .LBB0_9
+; CHECK-NEXT:    j .LBB0_10
+for.body.us.preheader.i:
+  %1 = insertelement <4 x i64> zeroinitializer, i64 %0, i64 1
----------------
arsenm wrote:

Use named values in tests 

https://github.com/llvm/llvm-project/pull/157628