[llvm] Precommit test for PR #172046 (PR #172127)

[Simon Pilgrim via llvm-commits]

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@@ -0,0 +1,72 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 3
+; RUN: llc < %s -mtriple=i686-unknown-unknown | FileCheck %s --check-prefixes=X86
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s --check-prefixes=X64
+
+define i32 @_Z1ft(i16 zeroext %x) {
+; X86-LABEL: _Z1ft:
+; X86:       # %bb.0: # %entry
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    shll $3, %eax
+; X86-NEXT:    movzwl %ax, %eax
+; X86-NEXT:    retl
+;
+; X64-LABEL: _Z1ft:
+; X64:       # %bb.0: # %entry
+; X64-NEXT:    shll $3, %edi
+; X64-NEXT:    movzwl %di, %eax
+; X64-NEXT:    retq
+entry:
+  %shl = shl nuw i16 %x, 3
+  %zext = zext i16 %shl to i32
+  ret i32 %zext
+}
+
+define i32 @_Z1gt(i16 zeroext %x) {
+; X86-LABEL: _Z1gt:
+; X86:       # %bb.0: # %entry
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    movl %eax, %ecx
+; X86-NEXT:    andl $8191, %ecx # imm = 0x1FFF
+; X86-NEXT:    shll $16, %eax
+; X86-NEXT:    leal (%eax,%ecx,8), %eax
+; X86-NEXT:    retl
+;
+; X64-LABEL: _Z1gt:
+; X64:       # %bb.0: # %entry
+; X64-NEXT:    # kill: def $edi killed $edi def $rdi
+; X64-NEXT:    movl %edi, %eax
+; X64-NEXT:    andl $8191, %eax # imm = 0x1FFF
+; X64-NEXT:    shll $16, %edi
+; X64-NEXT:    leal (%rdi,%rax,8), %eax
+; X64-NEXT:    retq
+entry:
+  %conv = zext nneg i16 %x to i32
+  %shl = shl nuw i16 %x, 3
+  %conv3 = zext i16 %shl to i32
+  %shl5 = shl nuw nsw i32 %conv, 16
+  %or = or disjoint i32 %shl5, %conv3
+  ret i32 %or
+}
+
+define i32 @shl_nsw_zext(i16 %x) {
+; X86-LABEL: shl_nsw_zext:
+; X86:       # %bb.0: # %entry
+; X86-NEXT:    movzbl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT:    movl $256, %eax # imm = 0x100
+; X86-NEXT:    shll %cl, %eax
+; X86-NEXT:    movzwl %ax, %eax
+; X86-NEXT:    retl
+;
+; X64-LABEL: shl_nsw_zext:
+; X64:       # %bb.0: # %entry
+; X64-NEXT:    movl %edi, %ecx
+; X64-NEXT:    movl $256, %eax # imm = 0x100
+; X64-NEXT:    # kill: def $cl killed $cl killed $ecx
+; X64-NEXT:    shll %cl, %eax
+; X64-NEXT:    movzwl %ax, %eax
+; X64-NEXT:    retq
+entry:
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RKSimon wrote:

unnecessary label

https://github.com/llvm/llvm-project/pull/172127